Haven been in forum for a while. Just saw this question.
I can confirm. Constant popping sound through Bell Fibe Pvr, also, every skip back or forward drops video quality to SD for many seconds. Stopped using PVR for Netflix and switched full time to PS4.
Thank you very much for your answer, no matter if it's a bit late (LOL). Glad to see that I don't have an isolate issue. I also found that skipping back/forward on Netflix App (from Bell Fibe receiver) is a P.I.T.A... so I ended doing pretty much the same workaround as you and using my Netflix App from my LG Smart TV instead of Bell Fibe App. I just found the Bell Fibe App more convenient because I haven't to switch input on TV and mess with the TV remote. But it's not such a big problem!