App crashes while changing view to landscape and viceversa

Expected behavior

After making necessary selection apps view should still remain the same.

Actual behavior

Making selection on the menu, then viewing in landscape app crashes. Likewise after making selection in portrait view then trying to view in landscape. App crashes.

How to reproduce

Download app on f.driod.
Turn on autorotate on device.
Open the app, below it a menu option is located. Then after clicking on the option, make a selection from the pop up. Then change device view.
bug is present.

• Application: filmchecker. Version 1.4.1.
• Operating system: andriod 7.0 nougat. Tecno wx3p.

Recording Of The Bug