Contacts
I am trying to add a new contact and the form keeps disappearing. I read the (now closed) same question thread. In my case there is no pause, it's not that it is timing out. It just won't let me get all the way through the form before closing.
Here's what I figured out: if I enter the person's first name and tap "done" quickly enough, I can get it to save in time before the window closes. Then if I open the contact in separate window I can edit it to add the rest of the details, while the main contacts app window freaks out.
So I *AM* able to add contacts, but only with a hacky workaround. Hope this helps others, also hope the app gets debugged.
MacBook Pro 13″, macOS 11.4