MergeGlyphs keeps freezing


I am trying to use MergeGlyphs 0.2 (29) on macOS 10.12.6 to find difference between 2 files.

After tabbing out of the app only to come back to it shortly afterwards, the application is frozen. According to the Console, it also renders Apple’s WindowServer unresponsive and throws UNIX error exception 17 among other things. Clicking on a visible part of MergeGlyphs’ window does not activate it either. After around 30 seconds of having a completely frozen system I am able to change windows and applications again.

Let me know if you need any additional info/logs.

Does it happen with all files or only with specific ones.
Can our reproduce it?
Can you do a spindump what it is freezing?