Mag 256 boxes are very fast and good boxes more than capable of running iptv without any issues, gosh even a firestick runs iptv without any issues.
The problem you have with glitching is down to the provider you’re using.
Iptv speeds will run perfectly fine at 10mb and above without glitching, almost everyone experiences faster speed than that.
whoever your provider is, id investigate using another one because a good provider will see you having no issues no matter how many is watching the game or any other channel...
That’s my honest 2p worth based on my experience...
It’s hard to find a good provider but when you do, you’ll be happy.
Please don’t ask me for provider details, I’m just giving information