I hope this latest update fixes the issues you were experiencing!
I believe the issues with the loss of gallery should be fixed now, it's held up in my testing at least. The only quirk is that in order to save the buzzer ending image to the gallery, it will require restarting from night 1. After it's saved, the checkpoint can just be reloaded as normal and the image will stay unlocked.
The Clock In button should now appear at the last word instead of 30 seconds after.
At the end of every shift, you will also have the option to review the images you got wrong and see what the correct answer would be.