I'm on stable/13 9168218160 and just had my Carbon X1 gen 7 wedge hard again after rebuilding world and kernel with 111554 patch applied and the hwpstate_intel.0.disabled hint still commented out.
I can't provide any debug info but I rebuild my system this morning and the uptime couldn't have been more than a few hours.
Before applying the 111554 patch I applied 110951 (also whilst on stable/13 9168218160) and my system had been running stable since 30 September ( https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253288#c67 )
I always do a 'make cleanworld' before rebuilding world and a custom kernel I also was using with the 110951 patch applied.
After building world and kernel I always run beinstall.sh and then immediately reboot.
I use latest and all my packages had been updated before rebuilding world and kernel