On the remote press Menu>Settings>Genera>System Information>system resources.
Look at Streams (a number) HD + (a number) SD
What numbers do you have?
Also unplug your unplug you Optik Receiver and Modem. Plug the modem in and wait till it’s online. Then plug in the optik receiver. See if the issue persists.
If that hasn’t corrected the issue give Telus a call to further diag the issue.