Keywords Missing from Keywords Panel
I apply keywords to all my files. I notice that large numbers of files are not showing any keywords in the "Keyword Tags" panel even though multiple keywords were applied and had shown there earlier.

Blank! It should show a few keywords. This example is for a file showing a Peregrine Chick so it should show the keyword "Peregrine Chick".
If I check the "Keyword List" that keywork is not checked.

There are thousands of other files showing the same error for a wide range of keywords that have been applied.
If I check the "Library Filter" for May 2023 I see there are 1060 files with the keyword "Peregrine Chick".

None of them show any keywords in the Keywords Tag panel of the Keywords List. This is the case for many other keywords. Tens of thousands of files are showing no keywords. This is obviously inconsistent.
I am hoping that the keywords are actually there as shown in the Library filter, but why are they not showing in the Keywords Tag panel and the Keywords list.
I am running Windows 10 latest version and LR 12.4.
