It seems, that after upgrade to IntelliJ 2021 the toolbar of my plugin (https://plugins.jetbrains.com/plugin/7996-java-method-reference-diagram) does not work properly any more:
- It's not possible anymore to use the category icons. I can click on them, but they are not active. They stay always inactive.
- The plugin have two custom actions in the toolbar. They are not appearing anymore.
Does something changed with version 2021 regarding to the diagram api?