I don’t have a clue what happened, I just loaded up the project I have been working on, hit play to refresh myself with what needed work, and got compiler error. Two widget designs were just straight deleted. (graphs still intact) I would report as bug but, “list steps to reproduce” yeah right.
looks like old ue4 bug, If I remember correctly it sometimes happens after ‘replace with child’ is used or sth and reopening editor. would paste link but answerhub is down.
Interesting, shame it hasn’t been fixed. I probably was using ‘replace with child’ at the time, so I imagine you are correct.