Mail v12.4 in macOS Mojave crashes with MailTrackerBlocker 0.6.0 PlugIn enabled when the app quits

[rprang]

I'm running SpamSieve together with the MailTrackerBlocker PlugIn.

Once and a while Mail crashes after I've quitted the app (maybe every 3rd or 4th time).
It occures even if the SpamSieve PlugIn is disabled.

Maybe it relates more to macOS Mojave and Mail

Mail Crash Log.txt