What Worked –
Uninstalling and Re-installing Kindle App
What Did Not Work –
Closing app and re-opening app
Turning tablet off and then back on again
Settings –> Applications –> Kindle App –> Force Stop
Postscript -> Last night, April 13, 2020, around 11 PM Denver time, Kindle started malfunctioning. It made me re-login repeatedly. It would run for a while, then ask me to login again. I’d login then it’d want me to log in again. Interesting thing though – this post got a number of hits right then. Whatever was going on, it seems to be something from Amazon’s end. It wasn’t just me.