The clock to set quiet time not showing in landscape mode

I should be able to see the clock to set the quiet time in both screen orientations.

But the clock for setting the quiet time start and end are not available which disables me to set the quiet time in landscape mode.

Install the app from Fdroid.
Launch the app.
Click on Quiet time start or Quiet time end option in potrait mode. You'll be able to see the clock to set quiet time in potrait mode.
Now change the orientation of the screen to landscape mode. The clocks disappear and you are not able to set the quiet time.