I've been having this problem since early nov'18. However I get a static screen of gold/bluish/silver snow, not gray.
It used to happen maybe once every 2-3 weeks, then increased in frequency in jan'19 to 1-2 times per week then daily. This month (feb'19) it's much less frequent.
It's very erratic when it will happen. And it can go for days between occurrences. When it does happen it seems to be limited to the show/movie I was watching. Even after rebooting it'll crap out at the same spot or a moment or five later. However, if I watch another show/movie it'll be fine.
It's almost like there's something in the Netflix stream that trips a bug in the Netflix app.
Reboots, factory resets of the PIK TV box will not fix it. It seems to cure itself with time. Either watch some other Netflix content or watch TV. After a day or two it seems to be fine. I know not ideal.
I don't think this is under Telus's control. I think the Netflix app comes from the Google app store and I don't think Telus wrote it.
In contact with Netflix support right this minute.
So far they're saying to have Telus check their firmware is compliant with the Netflix app requirements.
@psitech I seriously doubt it's the firmware. It's standard Android TV OS. For me, in extremely rare instances Netflix may crash but the majority of the time it works fine. The last Netflix employee I chatted with was far more helpful and actually took a report of what was going on, version of the software, etc.