Can’t add achors for accents

When selecting glyphs and add anchor (cmd-U), Glyphs 3 places anchors only for basic characters (a,b,c…), not for accents (dieresis, grave ect.). It did work in Glyphs 2. Is it a bug or did something change?

Glyphs adds anchors when using combining marks such as gravecomb.

Ah, ok, thanks.