OSX High Sierra and Mojave Double Titlebars or Menubars?

[Paul Dupuis]

I recall a recent (last year/this year - I think) bug where under OSX 
High Sierra or Mojave you could end up with double titlebars in your 
windows or perhaps it was double menubars?

I have spent a big chunk of time searching the Livecode Quality Center 
and can not find this bug.

Am I delusional, or was there such a bug and if, so can someone point me 
to it?