Yeah. I have a custom widget with a Named Slot in it. I then have an instance of that widget that I’m dragging buttons (other custom widgets) into (using the UMG UI - they’re not being created dynamically).
I dragged in 5 identical widgets. On first compile, all 5 threw an error. I then deleted them all and tried the exact same thing again. This time 2 threw an error and 3 were ok. I then deleted them all again, dragged them in one at a time, compiling as I added each button. And… magically they all worked. sigh.
Not sure what else to do. If I can’t consistently reproduce it in my own project I can’t imagine a clean project will reproduce it.