Plugin context menu not visible when starting from run config with IJ Build #IU-212.4746.92

Hi

Since version Build #IU-212.4746.92 the plugin context menu entry is not shown any more when starting from run config in IDE.

plugin.xml:

<idea-plugin>
  <id>com.your.company.unique.plugin.id</id>
  <name>Untitled</name>
  <version>1.0</version>
  <vendor email="no-reply@email.com" url="http://www.company.com">Worldline</vendor>

  <description>Blablablablablablablablablablablablablablablabla</description>

  <change-notes>none</change-notes>

  <!-- please see https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html for description -->
  <idea-version since-build="173.0"/>

  <!-- please see https://plugins.jetbrains.com/docs/intellij/plugin-compatibility.html
       on how to target different products -->
  <depends>com.intellij.modules.platform</depends>

  <extensions defaultExtensionNs="com.intellij">
    <!-- Add your extensions here -->
  </extensions>

  <actions>
    <group>
      <add-to-group group-id="ProjectViewPopupMenu" anchor="first"/>
      <action class="Action" id="Untitled" text="SomeText" description="Untitled" icon="AllIcons.Vcs.Branch"/>
    </group>
  </actions>

</idea-plugin>

There is also a strange error message in the log:

2021-11-12 08:12:12,623 [ 38028] WARN - nSystem.impl.ActionToolbarImpl - Please do not use ActionPlaces.UNKNOWN or the empty place. Any string unique enough to deduce the toolbar location will do.
java.lang.Throwable: toolbar creation trace
at com.intellij.openapi.actionSystem.impl.ActionToolbarImpl.<init>(ActionToolbarImpl.java:112)

The context menu entry was shown with earlier versions (2020.3 and before).

I'm using SDK IntelliJ IDEA IU-212.4746.92 with zulu 11.0.11.

To be mentioned: It's only not shown in IDE run mode. It's visible when the plugin is packaged and deployed (via jar include).

Is this a known issue? Do I have to change something in my setup?

Cheers
Stefan