I compiled my Android app with Qt 5.14.0 RC2, and copied .apk file to my Samsung S10 phone SD-card, and installed package from there. When compiled package is debug-version, it installs fine and program works fine. But when release version package is used, app is installed fine, but when launching app I get "Your application encountered a fatal error and cannot continue" error. And yes, while swapping between different versions, previous app is always uninstalled first.
I also created .aab package for Google Play, and if app is installed from Google Play store (from closed alpha) it gives same error.