I have not turned off SCI_SETBUFFEREDDRAW in my PPA builds
Oh, I'm sorry. I thought it was the case.
The recent build you refer to has removed for testing the IS_WIDGET_MAPPED check in ScintillaGTK.cxx, as suggested in [this comment](https://sourceforge.net/p/scintilla/bugs/2349/#bb06) on the scintilla bug report. The patch follows: [...]
OK. In the next hours I will mention here the link to the new bug at sourceforge.