Errors in triggers that check for "equals last value" disappear

[svenw]

hi,

i have problems with some items which are supposed to keep their value. so my trigger triggers if the value changes:
{eonstor1:hddStatus1.avg(#5)}#{eonstor1:hddStatus1 .last(0)}

so the problem is, after some checks there is no change anymore. i use avg(#5) now, so it at least does not disappear immediately.

is there any way to get a trigger that only gets fals again if it is confirmed/acknoledged?