That is indeed strange behaviour and I’ve never heard of anything like it before.
If you haven’t already, please contact us using support.allen-heath.com, if possible with a video and/or copy of the recording (I appreciate this could be large and a pain) along with all other details of the setup, so we can try to reproduce this and discover what’s going on.
Did you checked the 1.5.1 really installed into your mixer?
Check the firmware version on the Utilities/General/Diagnostic page!
My colleague installed it four times by the time he succeeded.
I feel like it’s software. Everything was fine (except the screen freezing) before I upgraded to v1.5.1
v1.5.1 caused this to happen literally 5 minutes after the update, and continues to sporadically happen. Sometimes within minutes, sometimes 20, but it always happens at some point.