diff --git a/apps/emqx_bridge/src/emqx_action_info.erl b/apps/emqx_bridge/src/emqx_action_info.erl
index 9376eeef3..c6304d9f7 100644
--- a/apps/emqx_bridge/src/emqx_action_info.erl
+++ b/apps/emqx_bridge/src/emqx_action_info.erl
@@ -26,8 +26,8 @@
     bridge_v1_type_to_action_type/1,
     is_action_type/1,
     registered_schema_modules/0,
+    connector_action_config_to_bridge_v1_config/2,
     connector_action_config_to_bridge_v1_config/3,
-    has_custom_connector_action_config_to_bridge_v1_config/1,
     bridge_v1_config_to_connector_config/2,
     has_custom_bridge_v1_config_to_connector_config/1,
     bridge_v1_config_to_action_config/3,
@@ -162,14 +162,24 @@ registered_schema_modules() ->
     Schemas = maps:get(action_type_to_schema_module, InfoMap),
     maps:to_list(Schemas).
 
-has_custom_connector_action_config_to_bridge_v1_config(ActionOrBridgeType) ->
-    Module = get_action_info_module(ActionOrBridgeType),
-    erlang:function_exported(Module, connector_action_config_to_bridge_v1_config, 2).
-
 connector_action_config_to_bridge_v1_config(ActionOrBridgeType, ConnectorConfig, ActionConfig) ->
     Module = get_action_info_module(ActionOrBridgeType),
-    %% should only be called if defined
-    Module:connector_action_config_to_bridge_v1_config(ConnectorConfig, ActionConfig).
+    case erlang:function_exported(Module, connector_action_config_to_bridge_v1_config, 2) of
+        true ->
+            Module:connector_action_config_to_bridge_v1_config(ConnectorConfig, ActionConfig);
+        false ->
+            connector_action_config_to_bridge_v1_config(ConnectorConfig, ActionConfig)
+    end.
+
+connector_action_config_to_bridge_v1_config(ConnectorConfig, ActionConfig) ->
+    Merged = emqx_utils_maps:deep_merge(
+        maps:without(
+            [<<"connector">>],
+            emqx_utils_maps:unindent(<<"parameters">>, ActionConfig)
+        ),
+        emqx_utils_maps:unindent(<<"parameters">>, ConnectorConfig)
+    ),
+    maps:without([<<"description">>], Merged).
 
 has_custom_bridge_v1_config_to_connector_config(ActionOrBridgeType) ->
     Module = get_action_info_module(ActionOrBridgeType),
diff --git a/apps/emqx_bridge/src/emqx_bridge_api.erl b/apps/emqx_bridge/src/emqx_bridge_api.erl
index 2343e3ccf..9ec0d440c 100644
--- a/apps/emqx_bridge/src/emqx_bridge_api.erl
+++ b/apps/emqx_bridge/src/emqx_bridge_api.erl
@@ -913,7 +913,7 @@ format_resource(
     redact(
         maps:merge(
             RawConfFull#{
-                type => downgrade_type(Type, RawConf),
+                type => downgrade_type(Type, emqx_bridge_lib:get_conf(Type, BridgeName)),
                 name => maps:get(<<"name">>, RawConf, BridgeName),
                 node => Node
             },
diff --git a/apps/emqx_bridge/src/emqx_bridge_lib.erl b/apps/emqx_bridge/src/emqx_bridge_lib.erl
index ed8e918fa..9386a38d3 100644
--- a/apps/emqx_bridge/src/emqx_bridge_lib.erl
+++ b/apps/emqx_bridge/src/emqx_bridge_lib.erl
@@ -18,7 +18,8 @@
 -export([
     maybe_withdraw_rule_action/3,
     upgrade_type/1,
-    downgrade_type/2
+    downgrade_type/2,
+    get_conf/2
 ]).
 
 %% @doc A bridge can be used as a rule action.
diff --git a/apps/emqx_bridge/src/emqx_bridge_v2.erl b/apps/emqx_bridge/src/emqx_bridge_v2.erl
index a9aeb0f8e..00d3ef6ec 100644
--- a/apps/emqx_bridge/src/emqx_bridge_v2.erl
+++ b/apps/emqx_bridge/src/emqx_bridge_v2.erl
@@ -1112,40 +1112,25 @@ bridge_v1_lookup_and_transform(ActionType, Name) ->
 not_bridge_v1_compatible_error() ->
     {error, not_bridge_v1_compatible}.
 
+connector_raw_config(Connector, ConnectorType) ->
+    get_raw_with_defaults(Connector, ConnectorType, <<"connectors">>, emqx_connector_schema).
+
+action_raw_config(Action, ActionType) ->
+    get_raw_with_defaults(Action, ActionType, <<"actions">>, emqx_bridge_v2_schema).
+
+get_raw_with_defaults(Config, Type, TopLevelConf, SchemaModule) ->
+    RawConfig = maps:get(raw_config, Config),
+    fill_defaults(Type, RawConfig, TopLevelConf, SchemaModule).
+
 bridge_v1_lookup_and_transform_helper(
     BridgeV1Type, BridgeName, ActionType, Action, ConnectorType, Connector
 ) ->
-    ConnectorRawConfig1 = maps:get(raw_config, Connector),
-    ConnectorRawConfig2 = fill_defaults(
-        ConnectorType,
-        ConnectorRawConfig1,
-        <<"connectors">>,
-        emqx_connector_schema
+    ConnectorRawConfig = connector_raw_config(Connector, ConnectorType),
+    ActionRawConfig = action_raw_config(Action, ActionType),
+    BridgeV1Config = emqx_action_info:connector_action_config_to_bridge_v1_config(
+        BridgeV1Type, ConnectorRawConfig, ActionRawConfig
     ),
-    ActionRawConfig1 = maps:get(raw_config, Action),
-    ActionRawConfig2 = fill_defaults(
-        ActionType,
-        ActionRawConfig1,
-        <<"actions">>,
-        emqx_bridge_v2_schema
-    ),
-    BridgeV1ConfigFinal =
-        case
-            emqx_action_info:has_custom_connector_action_config_to_bridge_v1_config(BridgeV1Type)
-        of
-            false ->
-                BridgeV1Config1 = maps:remove(<<"connector">>, ActionRawConfig2),
-                %% Move parameters to the top level
-                ParametersMap = maps:get(<<"parameters">>, BridgeV1Config1, #{}),
-                BridgeV1Config2 = maps:remove(<<"parameters">>, BridgeV1Config1),
-                BridgeV1Config3 = emqx_utils_maps:deep_merge(BridgeV1Config2, ParametersMap),
-                emqx_utils_maps:deep_merge(ConnectorRawConfig2, BridgeV1Config3);
-            true ->
-                emqx_action_info:connector_action_config_to_bridge_v1_config(
-                    BridgeV1Type, ConnectorRawConfig2, ActionRawConfig2
-                )
-        end,
-    BridgeV1Tmp = maps:put(raw_config, BridgeV1ConfigFinal, Action),
+    BridgeV1Tmp = maps:put(raw_config, BridgeV1Config, Action),
     BridgeV1 = maps:remove(status, BridgeV1Tmp),
     BridgeV2Status = maps:get(status, Action, undefined),
     BridgeV2Error = maps:get(error, Action, undefined),
diff --git a/apps/emqx_bridge_mongodb/src/emqx_bridge_mongodb_action_info.erl b/apps/emqx_bridge_mongodb/src/emqx_bridge_mongodb_action_info.erl
index 9fa19add2..060e6a17a 100644
--- a/apps/emqx_bridge_mongodb/src/emqx_bridge_mongodb_action_info.erl
+++ b/apps/emqx_bridge_mongodb/src/emqx_bridge_mongodb_action_info.erl
@@ -10,7 +10,6 @@
 -export([
     bridge_v1_config_to_action_config/2,
     bridge_v1_config_to_connector_config/1,
-    connector_action_config_to_bridge_v1_config/2,
     action_type_name/0,
     bridge_v1_type_name/0,
     connector_type_name/0,
@@ -26,20 +25,6 @@
 
 -define(SCHEMA_MODULE, emqx_bridge_mongodb).
 
-connector_action_config_to_bridge_v1_config(ConnectorConfig, ActionConfig) ->
-    fix_v1_type(
-        maps:merge(
-            maps:without(
-                [<<"connector">>],
-                emqx_utils_maps:unindent(<<"parameters">>, ActionConfig)
-            ),
-            emqx_utils_maps:unindent(<<"parameters">>, ConnectorConfig)
-        )
-    ).
-
-fix_v1_type(#{<<"mongo_type">> := MongoType} = Conf) ->
-    Conf#{<<"type">> => v1_type(MongoType)}.
-
 bridge_v1_config_to_action_config(BridgeV1Config, ConnectorName) ->
     ActionTopLevelKeys = schema_keys(mongodb_action),
     ActionParametersKeys = schema_keys(action_parameters),
diff --git a/apps/emqx_bridge_mysql/src/emqx_bridge_mysql.erl b/apps/emqx_bridge_mysql/src/emqx_bridge_mysql.erl
index 05c782b96..6f1036600 100644
--- a/apps/emqx_bridge_mysql/src/emqx_bridge_mysql.erl
+++ b/apps/emqx_bridge_mysql/src/emqx_bridge_mysql.erl
@@ -129,7 +129,7 @@ fields(action) ->
     {mysql,
         mk(
             hoconsc:map(name, ref(?MODULE, mysql_action)),
-            #{desc => <<"MySQL Action Config">>, required => false}
+            #{desc => ?DESC("mysql_action"), required => false}
         )};
 fields(mysql_action) ->
     emqx_bridge_v2_schema:make_producer_action_schema(
diff --git a/apps/emqx_bridge_mysql/test/emqx_bridge_mysql_SUITE.erl b/apps/emqx_bridge_mysql/test/emqx_bridge_mysql_SUITE.erl
index f1b3f8260..65413817d 100644
--- a/apps/emqx_bridge_mysql/test/emqx_bridge_mysql_SUITE.erl
+++ b/apps/emqx_bridge_mysql/test/emqx_bridge_mysql_SUITE.erl
@@ -773,7 +773,6 @@ t_missing_table(Config) ->
             ),
             Val = integer_to_binary(erlang:unique_integer()),
             SentData = #{payload => Val, timestamp => 1668602148000},
-            %Timeout = 1000,
             ResourceID = emqx_bridge_v2:id(BridgeType, Name),
             Request = {ResourceID, SentData},
             Result =
diff --git a/apps/emqx_utils/src/emqx_utils_maps.erl b/apps/emqx_utils/src/emqx_utils_maps.erl
index 1d97a926a..47b21a90a 100644
--- a/apps/emqx_utils/src/emqx_utils_maps.erl
+++ b/apps/emqx_utils/src/emqx_utils_maps.erl
@@ -345,7 +345,7 @@ indent(IndentKey, PickKeys, Map) ->
 
 -spec unindent(term(), map()) -> map().
 unindent(Key, Map) ->
-    maps:merge(
+    deep_merge(
         maps:remove(Key, Map),
         maps:get(Key, Map, #{})
     ).
diff --git a/apps/emqx_utils/test/emqx_utils_maps_tests.erl b/apps/emqx_utils/test/emqx_utils_maps_tests.erl
index 2778b5257..8b6e29235 100644
--- a/apps/emqx_utils/test/emqx_utils_maps_tests.erl
+++ b/apps/emqx_utils/test/emqx_utils_maps_tests.erl
@@ -170,5 +170,9 @@ map_indent_unindent_test_() ->
         ?_assertEqual(
             #{a => 1, b => 2},
             unindent(c, M)
+        ),
+        ?_assertEqual(
+            #{a => #{c => 3, d => 4}},
+            unindent(b, #{a => #{c => 3}, b => #{a => #{d => 4}}})
         )
     ].