I had this same problem, or similar, mine would sometimes not even load Bigbox as well as freeze. I did a lot of troubleshooting to determine the root cause, and it only happened when Thirdscreen was installed (even if disabled). What I discovered to resolve this (so far 2 days with no issues) was I needed to reinstall .Net 9.0. I ended up reinstalling the Desktop runtime and the SDK (did a repair on this) and after that everything seemed to work. No BigBox failing to load or freezing when in attract mode (had it on hours with no issues) everything is working again. I am glad too because I love this plugin and did not want to have to go without it haha.
Best of luck and I hope this helps (if you didn't resolve it already)