Welcome back to the forum!
I see the Float on your device indeed. I’ll just be a bit more cautious to jump to any conclusion for now. First, we need to see the full picture here.
You mention that you survey in the forest. That’s actually kind of hard for any GNSS receiver. This degrades the data quality so it affects the Fix calculation. That’s usually the main thing for Fix issues. You can share your raw data logs with me, of course, so that I can make an informed conclusion here.
Regarding the disconnection, please, make sure your Battery Optimization on Android is switched off. This setting plays hell with the background connection in any app, in ReachView 3 as well. It’s better to keep it off.