This doesn't seem to occur every time I run the editor, I can't get it to repro consistently
Note: It is possible that this is happening in blueprints based off of a native c++ class has been reloaded with Live Coding.
1. Create a C++ class based off of actor:
2. Make a BP based on FooActor
3. Add the Selected Correct event to the graph
Result: REINST classes are available in the class filter!
Expected: RESINT_SKEL classes do not show up
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-129601 in the post.