"recently added" shows the wrong entries

[Music-Guy]

I had re-tagged the entire collection a few months ago.
Since then, however, some new content had been added or changed in the meantime.

Of the content that was changed months ago, only a fraction is displayed.
While from the in the meantime changed or newly added content absolutely nothing is displayed.

It is also interesting that the same content that was shown to me yesterday and the day before yesterday under "recently added" -> "last day" is shown again today under "last day". So it's always the same content that is permanently displayed under "last day".