Creating a blueprint class with a child actor component and setting its actor class to Point Light, then copying and pasting it causes the editor to crash.
Tested in 4.21.2 (CL - 4753647), 4.22.1 (CL - 6063286), 4.23 (CL - 6684273)
Expected: The Child Actor Component is set to Point Light
Result: The Editor crashes
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-75509 in the post.