2.3 and system crashes

I have had two system crashes while using 2.3 (so I’m not sure this is a Glyphs problem). They occurred about a month apart. The screen seems to split, half white and half black. Audio cuts out and after approximately one minute the system reboots. There are no crash logs for Glyphs or kernel panics. Has this happened to anyone else?

What Mac do you have?

27" 5k iMac running El Capitan.

My iMac still runs on 10.10 and had two random system hands in the last two weeks. But they were not Glyphs related and didn’t show the audiovisual features you have described.