Checker-like Glitch on Cycles and Snow-like Glitch on Eevee Render I'm on blender 2.83.5  Today I tried to render my model here, it seems okay with no problems in render viewport

And then weird glitch appears as soon as I press F12 .. I did try to render on both render engines

Cycles Render - Checker like texture

EEVEE render - Snow like texture
So what is the cause of this glitch and how do I solve it? Thank you!
EDIT: the texture is painted manually on Texture Paint workspace. I've already unwrapped all the mesh
Solved by Jachym Michal, there's a backup collection hidden from viewport, but it was set to appear on render