App version: x.y.z (state whether from Google Play/F-Droid/Custom built APK)
Problem you may be having, or feature you want:
Adding a new episodes to the queue puts it at the bottom of the list. You have to go into the queue tab to change it’s position.
You should be able to choose between “play next” and “play last” when adding a new episode to the queue.
Episodes would enter the queue after what’s currently playing (play next), or normally (play last).