Uploaded media in a moodle forum no longer seems to work at all efter iOS 10 updates on iphones and ipads.

The only difference i can spot in the apache logs are that iOS10 devices get a 407 return from moodle when trying to query the file in question. I have tested this on two different moodle installations.

If i install a 3rd party browser on either iphone or ipad for example the opera browser, i can access the file without issues. I can't figure out if this is a moodle issue, or if apple has introduced some bug in iOS10 that seem to conflict with the way moodle controls access to files?

I have attached part of the apache logs below

On iOS9 requesting the file in question directly:

xx.xx.xx.xx - - [20/Sep/2016:10:29:48 +0200] "GET /moodle/pluginfile.php/24275/mod_forum/post/860/converting.mp4 HTTP/1.1" 200 78184 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 9_3 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13E230 Safari/601.1"
xx.xx.xx.xx - - [20/Sep/2016:10:29:49 +0200] "GET /moodle/pluginfile.php/24275/mod_forum/post/860/converting.mp4 HTTP/1.1" 206 601 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 9_3 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13E230 Safari/601.1"
xx.xx.xx.xx - - [20/Sep/2016:10:29:49 +0200] "GET /moodle/pluginfile.php/24275/mod_forum/post/860/converting.mp4 HTTP/1.1" 206 35048 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 9_3 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13E230 Safari/601.1"
xx.xx.xx.xx - - [20/Sep/2016:10:29:49 +0200] "GET /moodle/pluginfile.php/24275/mod_forum/post/860/converting.mp4 HTTP/1.1" 206 4578 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 9_3 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13E230 Safari/601.1"
xx.xx.xx.xx - - [20/Sep/2016:10:29:49 +0200] "GET /moodle/pluginfile.php/24275/mod_forum/post/860/converting.mp4 HTTP/1.1" 206 3842 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 9_3 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13E230 Safari/601.1"
xx.xx.xx.xx - - [20/Sep/2016:10:29:49 +0200] "GET /moodle/pluginfile.php/24275/mod_forum/post/860/converting.mp4 HTTP/1.1" 206 155518 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 9_3 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13E230 Safari/601.1"

Requesting the same file using iOS10:

xx.xx.xx.xx - - [20/Sep/2016:10:34:07 +0200] "GET /moodle/pluginfile.php/24275/mod_forum/post/860/converting.mp4 HTTP/1.1" 200 160172 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 10_0_1 like Mac OS X) AppleWebKit/602.1.50 (KHTML, like Gecko) Version/10.0 Mobile/14A403 Safari/602.1"
xx.xx.xx.xx - - [20/Sep/2016:10:34:07 +0200] "GET /moodle/pluginfile.php/24275/mod_forum/post/860/converting.mp4 HTTP/1.1" 407 26464 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 10_0_1 like Mac OS X) AppleWebKit/602.1.50 (KHTML, like Gecko) Version/10.0 Mobile/14A403 Safari/602.1"