I had a faulty CM3 and recently received a replacement from MicroNova - excellent support as usual!
I just installed the new CM3, loaded my config and upgraded to v0.4.4. I had noticed prior to the upgrade an error code being flashed on the LCD screen, but assumed it was something to do with the faulty CM3.
I think the root cause on this was the display code for the older display checked the API a little too soon and reports an error on the initial timeout that is never cleared. I’m unsure if this issue was ever completely fixed.
I rebooted which resolved it (hard reset). I didn’t actually check the app. I believe it’s the second time it’s done it. I’ll do more investigation if it happens again.