Yes, the SW on the HiBy devices can require careful handling to get around issues. I mainly use USB Audio Player Pro and it seems to work fairly reliably on my R5. I also often use Plexamp for playing my Plex stored FLACs and that also works well most of the time.
My worry with these devices is how long HiBy will continue to support it with OS updates and security patches, not that I use the device for anything sensitive, but it does use my Google account for the app store.
For Bluetooth, I have the original Samsung Buds Pro and the SONY WH900N’s, which I love and using LDAC for the connection, the sound quality is very good. I also just got the Soundcore Liberty 4 NC as my daily use buds for music and Teams calls and I am very impressed with them for the price. They multi-point connect to my phone and my iPad.
Looks great but WTF is up with those giant white wall tires?