Memory editor bug


I'm trying to figure out what could cause the issue I'm having in the TM editor (Trados version 2019).

I'm frequently adding aligned tmx memories to a SDL memory. The import works fine, the new segments are showing up in the concordance searches etc. but they are not displayed in the memory editor view.

Here goes an example:

After the import a perfomed all tuning, indexing etc tasks:

When opening the tm in the editor the tm seems to contain 25000 entries (25 pages with 1000 segments)

the last one being:

No filter applied:

As I know that this is not the last imported segment, I performed a search for a specific segment from the last imported TM

The found segment is 20519.

So my question is, why is this segment not displayed in the normal view?