P Desktop: Brown and grey tiles in Library

[Tack Turn]

Hey everyone, some (not all) of my folders look like this. It is on all devices. (IPad, Windows 10 Laptop and Samsung Galaxy S8. This is even the case when I log on directly through lightroom.adobe.com.

However, when I edit a picture it appears normal again. Also when I export the picture is not broken. Any idea, how I can solve it. It appeared after I got a new IPad and reinstalled Lightroom. However, this could be a coincidence.

Screenshot of the problem below.


Thank you for your help and best,

Heiko