You can try to add the label and the datetime control in a panel and hide the whole panel instead of the two controls. I've already tested it and it worked better for me.
May I ask you, if you got an answer to your first question in your post:
Question: is it possible to set a DEFAULT radiobutton, which is already selected, as soon as the mail has been opened?
I actually have the same problem, and. I have a Flexi Task, and I already identified the values of the outcomes - see attached screenshot:.
Then I tried to set this valule 3003 as the default value in the decision control:
but unfortunately the Radio Button "Projektauftrag ausgefüllt" is not pre-selected when I run the workflow.
So do you have already a solution to set a default value?
Any help will be very much appreciated. :)
this was very helpful, thank you! My approve was "3", reject was "4" and my other outcome delegate was "1027".