Photos folders not staying in order
I have A LOT of photos and have taken the time to organize them into folders, which used to be arranged alphabetically. Lately, when I open a photo (or folder? or maybe it's random? I can't figure out the trigger), the folder it was in moves to a new location at the bottom of the list, disrupting the alphabetical order and making it difficult to find folders I need. Does anyone know why this is happening or how to fix/avoid it? Thanks!
MacBook Pro 13″, macOS 10.13