Lightroom automatically pasting unwanted develop settings in Library Mode
I am experiencing a weird bug in Lightroom I've never seen before. I have opened an existing catalog (which has been opened and closed many times previously) which has 9 sub folders. 8 of the 9 folders in this catalog are normal with no problem. However in one particular folder I noticed all of a sudden that when I am in the grid view in the library module and I scroll down to look at photos in this folder, Lightroom suddenly started pasting develop settings as if I requested them when I did not. In this case, it is applying a B&W profile over the existing camera color profile plus other edits (cropping etc). The files do not change until you scroll down to see more files. If I go into the develop module to look at one photo at a time, I can see in the history a "Paste Settings" command above the last edit I made. Even in develop mode, the photos in the film strip start one by one changing with the unwanted pasted settings. If I move the filmstrip to the right, then new previews in the film strip change. It appears the automatic pasting by LRC only happens when scrolling in Library or Develop modules and the preview is being called to show. I have tried to revert the history for a single photo by clicking on the last desired edit in history and then pressing option plus mouse click and this does clear the unwanted "Paste Settings" and preserves the earlier edits. However I have over 700 photos in this folder and do not want to spend hours having to revert the history one by one for each photo. I have spent many hours editing photos in the folder and do not want to select all and revert to original. Is there anyway to stop this automatic unwanted pastings of develop settings? and anyway to revert the history in bulk to the last edit before the unwanted "Paste Settings" Many thanks for responses.
By the way, I tried reverting to the last backup I had made of this catalog and the problem must have started at that time. unfortunately, earlier weekly backups have already been deleted. Computer is macOS, Mac Studio with Apple M1 Max chip running macOS Monterey V 12.6.5. Other LRC catalogs were tested and do not have the problem.
