I’m positive I am missing something stupid, but for some reason the master compatible checks for a file I am working on are not detecting incompatibilities.
I have 4 masters on a single weight axis, there is no Custom parameters that should affect the masters, there a 6 instances along the axis. The 4th master was brought in from a separate font, and seems to be ignored when checking compatibility. When exporting as Variable Font I get errors on glyphs that are correctly identified as not compatible.
What obvious thing am I missing here?