Would have never expected that, I’m glad I came back to this thread to see if you had made any progress. Searching online about that, sounds like it’s actually a somewhat common issue (that I had never heard of before now). Basically the advice is to try a better quality hdmi cable, swap to 5ghz wifi (which is less likely to get interference from this than 2.4Ghz), route the hdmi cable different to have more space between it and the deck, or add ferrite cores around the ends of the hdmi cable.