Distance calculator closes by itself when app is been rotated

Expected behavior

Distance calculator on the application is expected to work perfectly in both orientation (portrait or landscape orientations)

Actual behavior

The distance calculator closes by itself when the orientation of the phone is been change from either portrait to landscape or vise versa

How to reproduce

• download thunder stop watch on play store

• open the application

• Put your mobile device to auto rotate.

• use the distance calculator

• rotate the mobile device

• the distance calculator will close by itself.

• Device : infinix note4

• Operating system: android 7.0

Recording Of The Bug