My Roku Premere+ (4630X) is having playback problems ever since the firmware update.
I hate to leave a rant, but I have no idea what to do. My Roku 4630X worked fine until the firmware update, 9.2.0 build 4131-29. Now I am getting the black HDMI warning screen, it only lasts a few seconds before the content starts playing. Sometimes, the best way I can describe this, is that the picture becomes bigger than the TV can display, and I get the upper left hand corner of the picture on the TV. Netflix is got a different problem, where it shows the Netflix logo, the screen goes black for about 5 or 10 seconds, and then the picture will display, but it displays like Netflix has been going for that time the picture was black.
I can make all the problems go away by forcing the display from auto-detect (4K HDR at 30 Hz) to 4K 60Hz TV, but it always goes back to auto-detect, and the problems come back.
I find it hard to blame my hardware, when it's been working fine until the firmware update was installed.