If create a new function in a blueprint you cannot place a return node with only exec, but if create a function from selection create a return node with only exec.
Hello ,
I was able to reproduce this issue on our end. I have written up a report ( UE-14092) and I have submitted it to the developers for further consideration. I will provide updates with any pertinent information as it becomes available. Thank you for your time and information.
Make it a great day