REGRESSION: Yes, does not occur in 4.17
When dragging a blueprint component from the Component tree into the graph, user receives an incorrect tooltip message (same one if they attempt an incorrect attachment in the hierarchy).
UPDATE: The error message seems to occur when for components that can't be ordered in the tree (inherited components, non-scene components...). With Scene components, it's a little more finicky. Sometimes there's not message when dragging into the graph (when there should be one that says it can be placed).
In some cases, they don't get any message when dragging
Incorrect message appears.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-49114 in the post.