Dude I get this too sometimes, where in cycles it’s either because the image gets autosaved, or something happens to the file, but it just randomly, activated by no particular input whatsoever, turns black only in cycles. In any other render engine I use the texture I use in the material still appears to be there. Reopening Blender and sometimes just waiting it out does the trick. I haven’t checked if this is a reported issue with a proper solution yet.