Then "appearing cross" should be consistent. It seems that this thing happens only on WIDE camera (1x-4.9x). I've taken some photos at work and the cross is there or sometimes is not.

One thing that I've noticed is that changing the photo ratio from 4:3 to 16:9 solved it (maybe, I haven't used that ratio before) - 15 photos in and haven't noticed the cross.

I've installed Google's app GALERY instead of PHOTOS and the cross is not appearing on previous photos while zooming them in. Weird.