It's probably a usergroup-based permission setting. My guess is that new or users with very few threads/posts will probably not be allowed to change their avatar.
Something like mentioned here: https://community.mybb.com/mods.php?action=view&pid=127 or https://community.mybb.com/thread-206168...pid1254146 etc
I'm also not sure if it really would make sense that the user's browsers always tries to fetch the images from a remote server... this kind of image loading could be misused for user tracking (or at least viewer count tracking etc) if this forum would allow any images from any server etc. Not sure why the forum software (myBB) decided to not always download the avatars directly from hashcat.net (a cached version?), but from remote URLs instead.
Something like mentioned here: https://community.mybb.com/mods.php?action=view&pid=127 or https://community.mybb.com/thread-206168...pid1254146 etc
I'm also not sure if it really would make sense that the user's browsers always tries to fetch the images from a remote server... this kind of image loading could be misused for user tracking (or at least viewer count tracking etc) if this forum would allow any images from any server etc. Not sure why the forum software (myBB) decided to not always download the avatars directly from hashcat.net (a cached version?), but from remote URLs instead.