Hi CA3LE,
Sorry for not replying sooner - I missed the last line of your post! I guess I got too involved in sorting out my IPTV/Android box that was playing up.
I had another problem tonight which is why I came back here and re-read your post. For about over an hour my IPTV (server is in "Asia" - don't know where, but probably Singapore) so I've been doing a lot of single-threaded tests to your Singapore server on both my Windows 10 PC and my XP (sorry!) PC. I used both Chrome and Firefox for the tests. I'll post them here in order of testing (the filenames have a timestamp) as the problem was probably changing over time.
I hope you can make head or tails of what was going on! (And I hope your forum s/w can handle all the pictures!)
1 Windows 10 PC, Chrome:
2 W10, Chrome:
3 W10, Firefox:
4 W10, Firefox:
5 W10, Chrome:
6 XP, Chrome:
7 XP, Chrome:
8 XP, Firefox:
9 XP, Firefox:
10 W10, Chrome: