Originally Posted by
Jon
Sorry, I should have been more specific. How is the TV connected and where does that fit in on the chain (input/output)? Are you using HDMI with or without ARC/eARC? What devices are hardwired to the modem/router?
I'm thinking you're hitting a bandwidth cap on the data transfer for your HDMI standard. This could possibly be fixed with a cable upgrade assuming everything isn't too old and still receives firmware updates. You can look more into how Apple TV handles ARC/eARC and HDMI 2.1 if you're interested. Again, if you just want to try something (for under $20), try replacing with an HDMI 2.1 cable (they're the ones marketed as 8K, blah blah blah).
Prices for 4K HDTVs with full 2.1 compatibility should be taking a dive this Q4.