Rules stop execution

I have a similar issue I did not have for months.

But in my case all rules work fine BUT the cron rules.
I detect this by:

// Check whether the cron rules are working properly
rule "Does cron work?"
when
	Item Astro_Sun_Azimuth changed
then
	if(!System_started.changedSince(now.minusMinutes(45),"jdbc")) {
		if(ActTime.state != NULL && ActTime.previousState(true,"jdbc").state != NULL && !ActTime.changedSince(now.minusMinutes(60),"jdbc")) {
			logInfo("system.rules", "ActTime (" + ActTime.state + ") did not change since 60 min - is there a cron Problem?")
			sendTelegram("OH_TeleBot", "ActTime seit 60 min nicht aktualisiert: " + ActTime.state.toString + "\nCron Probleme?")
		}
	}
end

I don’t use Thread::sleep at all (after reading “long running rules” from @rlkoshak months ago :slight_smile:

Anyway. I don’t have a clue what’s causing this.