This topic has probably cursed everyone who read it with a huge confirmation bias - every time we see Don't be Hasty recur after being played, it's just going to confirm our idea that it's glitched.
That being said, I just saw it happen again. I really don't see people use the card that often, but I've definitely seen it reappear after being played a number of times, of the relatively small number of times I've seen it played.
How many trials did you do Mojko? Is it possible it's based on some other condition that didn't occur when you tried? Maybe it really is just an observation bias, I don't know.