Sierra or High Sierra?
Yes, I am seeing an annoying number of crashes of Keyboard Maestro Engine in High Sierra (10.13.x). It is very frustrating as all I have is that there is some sort of memory corruption and I don't know where (I don't even know if it is my code or system code that is causing the corruption). It seems far more prevalent on 10.13.x - in fact almost all crash reports I receive are for 10.13. Considering roughly 20% of Keyboard Maestro users still use 10.12, the crash rate in 10.13 is very much out of proportion to the users.
The previous release (8.2.1) and likely the next release (when it eventually comes) contain a multitude of “fixes” that are attempts to guess where the issue might be and adjust the code or add assertions that might indicate something, but because the crash does not happen until some time later I have very little in the way of useful data to work on - basically the crashlogs are more indicative of what Keyboard Maestro spends its time doing than what is related to the crash.
And yes, it is extremely frustrating as I am generally very proud of the low bug and crash rate in Keyboard Maestro, and this one bug (which may not even be in my code!) is causing a very unacceptable deviation from that.