ok, here's my thoughts.
I've had Ilox since January, a default install, was a private IP address, and the DHCP server on the ONT was active. Turned wifi off from the ONT.
My casita is about 60-70 feet from the ONT, installed an Orbi RBK50, next to the ONT and in the casita, excellent wifi in the casita
For the first week or so, no issues, then IPTV started buffering, to the point it was unwatchable, email the noc, requested to turn off the DHCP server and assign a dynamic address, I assign my computers an address from the Orbi, this works for awhile, then buffering on some streams, if I select a channel that is 720 or less, no problem, if its 720 or above, it may or may not buffer.Had the noc send out a tech, they said there may be a charge, he arrived, I showed him the issue, he immediately said, "you need a dynamic address", I email the noc, yes you have a dynamic address, the issue persists. I started to keep a log of IP addresses assigned to the ONT, I have had the same address since May 31, before and after a reboot and a power cycle of the ONT.
I have tried a couple VPN's, protonvpn and mullvad, both paid plans, the buffering continues.
One of the tests the tech did was a speed test, his preferred site: https://www.nperf.com/en/
I have no issues with the speed, just the quality of the connection, I do believe there is some form of throttling going on, another user of the same IPTV provider, lives in Villa Nova, started experiencing the same issues with Ilox.