Telus Optik TV uses the Mediaroom platform. When you change channels on live TV, it first uses IP unicast to enable instant channel changes. After about 10 seconds, it switches to UDP multicast, which is where you're running into a problem.
At a quick glance, it looks like your settings are correct - multicast and IGMP Snooping enabled. Make sure your switches are also compatible and double-check that nothing is blocking UDP. It might be worthwhile to temporarily bypass the switch to the PVR to ensure that's not the problem. Also, it might be a good idea to reboot everything to make sure they're all using the current settings. If that still doesn't work, here are a couple of old threads that may give you some ideas. Let us know if it works.
Successfully Replaced Actiontec T1200h with Asus RT-AC56U .
Actiontec V1000H and AirPlay / Airport Extreme .
At a quick glance, it looks like your settings are correct - multicast and IGMP Snooping enabled. Make sure your switches are also compatible and double-check that nothing is blocking UDP. It might be worthwhile to temporarily bypass the switch to the PVR to ensure that's not the problem. Also, it might be a good idea to reboot everything to make sure they're all using the current settings. If that still doesn't work, here are a couple of old threads that may give you some ideas. Let us know if it works.
Successfully Replaced Actiontec T1200h with Asus RT-AC56U .
Actiontec V1000H and AirPlay / Airport Extreme .