I agree. I have 2x4670RW…10.0.0.0 Build 4209-46 and 1x4660X Build 4209-46 Re: ticket 4369426 from May 19, 2021.
This all started from the May 12, 10.0.0 upgrade. My Roku media Player App started having audio cutoffs every 9-10 sec on my H264 .mkv and .mp4 files. They still play fine if I use my old WDTVLive player or my LG 43UJ6300 TV player, so this proves the problem is with Roku’s May 12th Upgrade. I have a few H265 files that play fine, but 95% of my library is H264.
I have wasted a lot of time trying all the audio options, restarting, resetting, powering off my roku’s, FiOS gig network, TPLink 11000ax router to no change.
Please have your overpaid 130k yr software engineers, according to CNN data, fix your problem. This is getting old and maybe time to go back to cable or FiOS tv or something else. You were a good thing while you lasted. Been having problems with the sling app also, but won’t get into that. I am about ready to jump ship.