I have just recently purchased the Roku Soundbar. It is fully updated and hard wired to my router.
My current broadband is with Virgin Media and I get 350 Meg down and 37 up so have the bandwidth.
My issue is that the Prime app won't stream 4k content. YouTube, Netflix and Disney don't have issues. Streaming Prime from my Sky Q box and Samsung smart TV, both connected wired to the same network, have no issues.
Wondered if this is a known bug with the sound bar app, or if there's a possible fix.