Stuck on "processing" when uploading images on mobile devices

Following up on this thread, but cannot reply to it:

This has reoccurred. I have not changed anything and have been up to date with patches. Only occurring on mobile devices, regardless of operating system, browser, etc.

Desktop works fine.

Is anyone else experiencing this or know what the problem could be? Thank you so much.

For me is the opposite. S3 fails (here in Meta) on Linux Firefox based browser and works in Android Chromium based one.