I wanted to add an "AND (cond2)" to my existing "Repeat while xxx" loop but got into a state where the RM app couldn't be edited (no buttons appeared that allowed me to do anything to that rule).
I was able to add the "AND", but that was it--it looped forever and never came back to the screen allowing me to add the following condition.
I got the first condition entered, as you can see. I then got the "OR" added. When I tried to select "between 2 times" for the second condition, I got into this problem again.