The menu button doesn't work after clearing local cache/index

Expected behavior

The menu button located at the top left of the app should be always responsive whenever we press it.

Actual behavior

The menu button in synthetic lite doesn't respond to a touch when we clear local cache/index from the options menu. In order to make it work again we have to go back and launch the app again.

How to reproduce

Launch the app and press the options menu.
Click on the third option available, clear local cache/index.
A message will pop-up whether you want to clear it or not.
Press ok to confirm.
Now try to click on the menu button again. It doesn't respond.

• App: Syncthing lite v0.2.0
• Operating system: Android Nought (7.0)
• Device: Motorola moto g5 plus

Recording Of The Bug