When I export with the latest Beta, this happens to my brevecomb.case character.
Left working Glyphs file, right exported OTF. Maybe you can spot the difference.
Background: point placement by myself, foreground: point placement by Glyphs export.
brevecomb is perfectly fine by the way.
Is that on me? Did I do something wrong? If so, what exactly?
It exports perfectly fine with a prior stable version.