I usually use WIndows app for answering doorbell.
I noticed that after I click on notifications in Windows (which is shown after someone press doorbell button) app is opened on live view whic is great.
In live view there is hang up (red) / answer (green) icon. If you don’t answer you can click red “hang up” button or you can click X in top right corner like you close all other windows apps.
If you use red “hang up” everthing is ok and Doorbell goes back to “idle” mode with white LED circle.
BUT if I use X for closing live view doorbell is stucked on round circling of blue led. I don’t know if it goes back to “idle” after some time, but if not, than no one from that time on can’t use doorbell.
It looks like dorbell never goes to “idle” if live view is not closed with “hang-up” icon …