Think this may be unrelated to the current virgin media/PSN issues as have had this issue for a while. However, don't think a PSN issue.
I have a hub 3. When it's in router mode there are little to no issues with my ps5/ps4 connecting to the psn and speeds are good (barring current issues in another thread) However, when my hub 3 is in modem only mode and I use my own router (non virgin media plume pods) the speeds drop to both the ps5 and ps4 and the connection becomes sluggish. As a note, I have no issue with any other device on my network.
I have contacted Plume support and there are no issues with the pods.
The only way to resolve this, it appears at the moment is to keep my hub 3 in router mode, which I'm not keen on.
What router are you using, or is one of the Plume Pods a combined router/access point?
Is there any QoS running on the Plume units? What is the maximum throughput on the WAN link to your router?
Yes, the main pod I have connected to my hub is the combined router/access point as you put it. There is QoS/network optimisation in the background. Have been onto the Plume support already and they could not find any issues with the pods.
Wired of WiFi to the console? Try a wired connection direct between the console and Hub when in modem mode. This will rule out any WiFi/QoS problems.
Yes, the Hub is in modem only mode when testing. Console won't be connected directly to the Hub as wouldn't get an ip address then. So basically playstation wired to my plume pod router which is wired to the Hub.