Hi,
I did some tests in pre-production and there is a small regression with the update Feb. 7th 2022 – Version 4.8.9.1
On the same issue as in this post, with pdf media (and only pdf), after the upload the thumbnail is not shown, instead just a light grey.
It was the same problem in version “August 9th 2021 – Version 4.8.6.1” and it was fixed since “August 16th 2021 – Version 4.8.6.2”.
This is not blocking because pdf documents can be used for publications, but I still report this regression.
Best regards
Christophe