App - entries in table are deleted (linked items)

Hi,
when I create an App, where I want to add “link to other records”, for some columns, the entries in the app are deleted, when I refresh / move to another page in the app, but data is available in the backend tables. Is this a known issue? or is there a limit of number of “link to other records” in an App?

Cloud or Self-hosted?
Screenshots?
Links do not just disappear.

Cloud.
They do disappear in some colums in the App, I can still see them in the linked table, when I don’t use the App to check.

Please provide a side-by-side screenshot: Base vs. app.

You also refer to “some columns” (plural). Do you mean rows? If this is no typo, how many link columns do you use?