After manual pre-processing and stacking in Sirill this weird artifact pops up when showing image in autostretch.
I've tested and it is present either if i use the only flats or only darks or none or both so it's not its problem. Have you got any ideas how to get rid of it?

I've tested and it is present either if i use the only flats or only darks or none or both so it's not its problem. Have you got any ideas how to get rid of it?
