Welcome to the Manjaro community.
This seems consistent with my understanding of how these preview thumbnails should work, however, I have not noticed:
I’m sure others will provide additional feedback when they are able.
As a new forum user, please take some time to familiarise yourself with Forum requirements; in particular, the many ways to use the forum to your benefit:
The Update Announcements should be checked frequently for important update related information.
These announcements contain a Known Issues and Solutions section and should generally be checked before posting a request for support.
Output of the following command formatted according to forum requirements (see links above) may be useful for those wishing to help:
inxi --admin --verbosity=8 --filter --no-host --width
Be prepared to provide more information and outputs from other commands when asked.
Regards.