I have had this same thing happen, but it is not blue at the top where is says you finished without error, it is in red, and windows reports the program has stopped responding, which is normally a sign you aren't using enough vcore.
I use LinX as a starting point for testing stability to give an idea if it is close. Sometimes it will pass, then fail with same settings a day later, I think is has to due with the conditions when you were testing, such as ambient temps, or other programs being open possibly. Prime blend will do the same thing, can pass it several times at the same settings then fail at random. None of these programs are 100% consistent IMO.
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