Hi! I have a sad!
I use Child Actor Components fairly frequently for my player avatar customization system, and ever since 4.14, there have been some serious instances of data loss in their use. Right now, it tends to be a result of a child actor component just losing data at the top-level (like an actor with a Child Actor Component as a child will lose bits and pieces of data from the intended-assigned child actor).
This is mega hard to explain with any clarity, but here’s a screen shot (I had to delete and re-assign the top attachment, the bottom attachment is how I found it):