didn't prompt snow there.
That's actually a specific strange interaction between multiple LORAs and my merge which is already prone to noise. I think I've talked about this somewhere before, but as it concerns SD (or at least my merge experiments) as you increase the amount of small detail you increase the likelihood that the detail will somehow get "corrupted" and morph into unintended larger objects. Sweat drops are the other common form.
Or not. This stuff is a big black box even for experts that have spent decades doing programming stuff so I'm just going by my own anecdotes with experimenting.
Generating images without errors (or cleaning them up afterwards) is too much work, anyway.