missing photos in photos library
I am on Big Sur 11.6 on an Imac. I can import images from my Iphone to Photos. I can edit them and they stay in the library for a while. I can close and restart Photos and the images are still there. However, after a few hours or the next day, ALL of the images I imported are gone. They are neither in the imports, nor in the library. This has been happening for about a month. No issues prior to January 26th, 2022. All images are accounted for up until that date.