tbh that sound more of a your replay issue (could be acc or borderline damage) 
instead they should make failed replay can be watched
#Replay accuracy
burnt hare
wooden relic
A forced replay system where every roll is recorded would remove some of the nuance of setting up a consistent farm that doesn't rely on luck/good crit rolls. It can be frustrating, but also satisfying when you finally get it working.
I'd rather the system simply not stop replaying just because you failed, or give you a threshold like it only stops if you fail 3 times in a row, or a total of 10 times. And maybe you could set the threshold yourself. That way if your farm is 90% successful you could still use it and just accept that you're wasting a bit of extra SP on the fails.
But at least then you could leave it running and not have to constantly restart it. Or come back 2 hours later to find that it failed on the second attempt and has been sitting there doing nothing.
verbal crater
That or let people replay their failure and see where it went wrong.
slate salmon
honestly this sounds like battle cats where units always hit debuffs on enemies even though it isn't guaranteed every time