Cautiously assuming this has something to do with the preview app @rullzer but happy to be corrected.
On the hour (cron) I see the same error in my log without fail since uploading some “jpeg” (not jpg) files earlier today:
Error PHP imagecreatefromjpeg(): gd-jpeg: JPEG library reports unrecoverable error: Unsupported marker type 0x08 at /var/www/html/lib/private/legacy/image.php#538
The images appear to be standard WhatsApp-converted (compressed, etc) jpeg files so I’m not sure what’s happening here.