Hang and Memory Spike when you create an endless loop in AnimBP Event Graph

Hang and memory spike (that doesn't go away) when you create an endless loop in AnimBP. Blueprints have a safeguard against this when you try to PIE with an endless loop, but I think the Animation Preview doesn't have this same safeguard.

1. Create a ThirdPerson Template project
2. Open the ThirdPerson_AnimBP
3. Set up the EventGraph like in the attached screenshot (Add a print string and make it loop with Set Speed
4. Compile the AnimBP

Result: Long hang and memory spike
Expected: A warning about the loop

Infinite loop was created, not an Engine bug