Lagging Text Tab

Version 2.4.2 (1060)
For a while now actually typing in a Glyphs tab is really slow for me, even on a clean Glyphs app install with deleted application support and preferences folder…?

OS X 10.11.6, 2.3 GHz Intel Core i7, 16GB Ram

Can you try updating to Version 2.4.3 (1064)?

Can you send me the …glyphs and a screencast what you see?

Ahh I realised whats going on, I have 12 tabs open… but how come that should lag the new tab…?

Open tabs shouldn’t have an influence. Can you send me the file with those tabs open?