hey. signed up with a similar problem, also BTT and catalina
but: i have never used/enabled/disabled any handwriting tools! also, handwriting tools are not enabled, i checked.
it's a completely fresh install of catalina, hardly anything installed.
unfortunately, i am not sure what caused the issue exactly. i was setting up the touch bar, when the colored spinning wheel appeared, the system went more and more unresponsive, i could still move the mouse, but no access to any system functions, no checking or killing of processes possible. the fans sped up, the macbook was going very hot, so i decided to instantly shut it down. i looked at logs via console and found similar entries to the ones posted above.
it -may- have been caused by two things. either by connecting an external usb keyboard, or by putting the display to sleep, or by none of these actions. i cannot recall anymore.
in the logs, i noticed attempts to update the system or at least attempts to check for updates at the time of the crash.
this issue doesn't seem to be necessarily related to the handwriting tool. it seems its related to BTT on catalina, however.
are there any news?
thanks a lot