Re: I found a fix to the P10 with Amazon Alexa tablet's Bluetooth disconnection issue!
Wanted to post here as the alexa docking bluetooth issues for this tablet was driving me crazy. It would disconnect everyday and it would be annoying to wake up and say "Alexa..." to find out the tablet disconnected from bluetooth and never reconnected. I think the problem is the bluetooth is being "Battery Optimized" by default. You have to go and turn battery optimization off for bluetooth.
I'm on Android 9:
1. Go to Settings > Apps & Notifications > Special app access > battery optimization
2. Select "All apps" from the dropdown menu
3. Scroll down and find the app "Bluetooth", select it and then choose "Don't optimize". Click done.
4. I also did the same for the apps "Smart Tab P10" and "Vega OTA". Not sure what these 2 apps do but I disabled battery optimization as well on them.
This seemed to work as the tablet has not disconnected from bluetooth overnight as it usually did before. Hopefully this helps someone with this Amazon alexa tablet/dock.