TataYoyo I think I have only streamed videos with no more than 2900p lately, so I did not really notice the low streaming speed, but I just have tested one of the SLRO 8K videos and indeed, no smooth playback above 2900p. I am wondering why this seems to bother only a handful of people, maybe it's depending on the streaming server location.
Meanwhile, I have sent an e-mail to support as suggested earlier by @doublevr