output of mlm_degrain becomes progressively worse as refine is increased

[NSQY]

https://slow.pics/c/AOa8rb9B

from vstools import core, depth
from vsdenoise import mlm_degrain

src = core.ffms2.Source()
src = depth(src, 16)

src.set_output()
[mlm_degrain(src, tr=2, thSAD=500, refine=i).set_output(i + 1) for i in range(6)]

[Setsugennoao]

Fixed in e469323