I also own a RMCLoader One B (clear case). Running payload 5.6.0 Hekate works without issues. This update you are talking about is for the RCMLoader One Plus (White box).
Working great from my side but only tested it on 10.1.1 and AMS 0.14.3. Can't find the new FW so need to wait on that. My Switch is offline ever since I used it for CFW.
Freezing issue can't be solved at the moment. Only thing that works is playing Mario 64, Save progress, restart switch fully and then you can play another game if needed. For some reason Mario 64 crashes also when exiting to Horizon and then start a whole other game like minecraft. It also...
It only crash when SM64 has started and go back to main menu. Also when you go to horizon close game and start. Only Galaxy and Sunshine work flawless. I’m on 10.1.1 and AMS 0.14.1.