Android Hardware Back Button Problem

I published my app’s first version in last month. I haven’t added any additional code and android hardware back button was working. Then i updated package.json several times to latest versions of angular, cordova and ionic. Now it’s not working.

Is there any known problem about a package version that prevents android hardware back button?

Btw, i tried downgrade with old package.json. Still does not work. I upgraded global Gradle version to 5.5.1. Maybe problem is gradle versions? Because Ionic use Android Gradle Plugin 3.3.0 but Gradle 5.5.1 is for 3.4.0+.


Thanks in advance.