Hello!
I just install again antennapod on my new phone and import the data base from my old phone! All import correctly but after some times, the app return to a blank configuration. I have try to reinstall and reimport datas but with the same result!
Have you got an idea about how to resolve this issue, please? 
My configuration infos :
Environment
Android version: 10
OS version: 4.9.186-perf+
AntennaPod version: 3.11.0
Model: H8324
Device: H8324
Product: H8324
Manufacturer: Sony