At the moment there is not a fix... You can try setting manual fan speed to check if that works. Currently webMAN is using the advanced poke to enable the set fan policy function and the original value is restored immediately as habib suggested. But it seems that Hypervisor don't like that. Does the shutdown only happens with homebrews? Or also with game backups? I could implement an auto switch to SYSCON mode when INGAME is detected, but I don't think that would help due I detect IN-GAME in a polling loop, and the timing detecting it would be an issue.