Commit 70e9dbd756 has fixed#18394 but unfortunately it also caused several other issues observed e.g. in #18540. Apparently wxComboCtrl doesn't fit well to the wxCompositeWindow framework - especially when wxCB_READONLY flag is set and there is no main editor control what is problematic for wxCompositeWindow implementation. At the moment it is more pragmatic to go back to the original wxComboCtrl concept as a plain compound control to fix the regression and try to fix#18394 in an alternative way.
Closes#18540.
See #18394.
6b00cc80f1