Cannot delete favorite search or favorite show hide fields

The dialogue box of the edit/ find/select favorites does not contain a button anymore to delete. The same in the Edit Hide/Show Fields Favorites.

I am working with 10.2.0b29 and MacOS Monterey.

Thanks, you are correct, this is a new bug in macOS Big Sur and later. I have just fixed it, the fix will be available in b30. Note: The bug actually could affect any Matrix object.