[ft-devel] Glitchy rendering of overlapping outlines in variable fonts

[Nikolaus Waxweiler]

Hi list,
I was just looking at SourceSerifVariable-Roman.otf from 
https://github.com/adobe-fonts/source-serif-pro/releases/tag/3.000R and 
found this discrepancy between the variable instance of Black and the 
static one with overlaps removed:

https://i.postimg.cc/VLLmQqV2/Bildschirmfoto-vom-2019-09-25-21-22-01.png

Same thing in the variable TTF. Is this a known limitation in the 
renderer?