Image thumbnail on receiver side becomes all black


When sending image, the sender side will show the image thumbnail but the receiver side only show a black color thumbnail. Click on the black thumbnail can download the image without error.

Screenshot at 2017-12-28 15-38-22

I am using Nextcloud 12.0.4 and ejabberd 17.11.

And, where will the sent file be stored? in Nextcloud server (as a file or in database) or in ejabberd server?


This has been already fixed in the next major version, but I will try to backport it.

Thanks sualko.