I also have the problem that the roku streaming stick+ defaults to mute on power on. It is more than just an annoyance to me. I tend to miss the audio of first few seconds and have to rewind to hear it. I'd like the riloku team to provide workaround and fix.
I have the same problem, but don't have a mute button on my Roku remote. However, my issue is not with a soundbar. Whenever I turn on my tv, the sound is muted and I have to bring up the Roku app on my phone, to unmute the sound. I tried deleting the Roku app from my phone, but that didn't solve the problem. I also looked everywhere in the setting to try and fix the problem with no success.
I have the same issue. I had a 2018 Roku Ultra, and it worked fine. I bought a 2020 Role Ultra, and swapped them out. Same connections and settings. No matter what I watch (Netflix, Hulu, YouTube etc.) The first few seconds of the video is muted and them the audio starts playing. Its very annoying.
I have the same issue... worse, once in a while (a week or so), the audio is just legging in a major way (lip Sync). I have to reboot to get it back; and, maybe it's not related, the video output would mess up and I have to reboot. Maybe this is a hardware issue.
I have the exact same problem as you and it's extremely annoying.
I've spent a couple of hours with Roku tech support and I like to tell you that they've been helpful but it's not the case. They're convinced that I have a wrong setting but this is my third Roku and the previous ones have been fine.
I use the Roku media server to listen to my humongous music collection and losing the first two seconds of every song drives me nuts.