Also a fairly common cut-off. Perhaps I’m being a bit too generic when I say “most” brand names. I should perhaps have said “many” 
I also just realised that Pylontech cuts at 3.6V per cell.
I suppose that in a very badly unbalanced battery, you could be in a situation where most of the cells are at 3.2V and one is at a higher voltage. But below 3.3V you are still very much on the “flat” part of the charge curve, so usually the imbalance only shows up above 3.35V per cell. At least, that’s the worst case I’ve dealt with (3.35V on 15 cells, 3.75V on the 16th one).