for me it was updating the firmware a 2nd time. even though i was completely up to date w/firmware, when i recovered via Recovery Mode, H90 Edit said i needed to update the firmware. my particular freeze-up kicked me back to the firmware version it shipped with. Then, when updating to the first of five firmware versions, it locked up right after trying (1.1.4 i believe). It did this 4 times, so on the 5th try i said “screw it” and started with the 2nd firmware update along with all the others sequentially until i was updated to the latest version. It’s been about 4-5 days now, and no more freeze-ups. I’ve also done a bunch of power cycles to keep pushing/testing it. so far, so good.
to be clear, my lockups were happening upon power up though, not while attempting to manipulate knobs/settings, like the OP.
