In v1350 the left panel isn’t displaying the full names even when expanded
fix it.
Hope this get fixed soon. Have reported this a few months back as well: Width of instances column in Font Info panel 
In Glyphs 3 (3.0.3 (3091)) I’m having this problem with truncated names in the left column if the Info panel.
Move the divider to all the way to the left and then back where you like it.
I’ll have a look.
Ah, good to know that! 