UPDATE: Much better as of 23.0.41, but not quite...
I'm tagging many photos, often just one or two at a time, for a big scan-and-organize-family-photos project. When tagging photos, MC frequently crashes, first becoming unresponsive when looking up tags, then hangs, then closes itself or Windows does it. No other symptoms, no obvious pattern. (No problem using the same MC to tag music/audio files.)
Typically, I have a photo selected, then type a Caption, then often retype the Date (changing the scanned date to the actual photo date), then select (and/or add) one or a few Keywords. That's when it crashes. Usually I realize MC is about to crash when I can select the first keyword, but then it can't find the second keyword that already exists in the database. I know what's coming, just wait, MC crashes.
Even when MC does not crash (or, not yet), when tagging photos it eventually it loses the ability to search for existing values in the Keywords field. No matter what I type, nothing is found. I can create a new Keyword value, but the automatic search stops working. That is probably the biggest clue to what is broken, because it seems to be internal to MC, not related to the image files. However, I don't seem to encounter this Keywords lookup failure when working on music/audio files.
At this point, if I close MC then restart it, it resumes working properly (for a while). If I ignore the situation, perhaps because I'm not changing Keywords, but perhaps typing in dates or something, eventually MC will crash.
I don't know if the problem would happen with other fields, because for images Keywords is the only field I use that has many, many existing values, therefore automatic search happens, useful because almost all needed Keyword values already exist (almost 60 thousand image files).
The problem occurs on average every 20 minutes of continual work on photos in MC. I restart and all is well....until it happens again. I go back to the same photo and it tags smoothly, so I don't suspect file issues. I'm used to the instability, it's not ruining my day, but it annoying and a bit time-wasting.
This issue seems limited to tagging JPG files, since the same MC works reliably with my music files. I've been organizing and tagging image files with MC for many years, many versions, and don't recall this instability except in recent months, so perhaps an anomaly has crept in?
PC is Windows 10, very stable, 12GB RAM.