Some people (like me) is experiencing heavy problems with blueprints, please I would like you to take a look on the issue, like its not a problem easy to reproduce I added a download link of my bugged project for you to test.
If you need more examples of the issue be free to contact me, I have more examples of the download content with the first issue I found (without try to work it around), and I have another private project with this issue too.
Project version: 4.4.3
Forum thread with more info: https://forums.unrealengine.com/showthread.php?50158-2nd-Time-Blueprints-get-bugged-by-theirselfs
PROJECT FILES DOWNLOAD: SurvivalTest.zip - Google Drive
Alert: Note that this files have been tried to be reworked to avoid the issue, so in the original point they were made in other way
Aler2: Do not copy these files to your own project making copy/paste or your project will be infected! the issue is persistent so even if you copy a node it will start crashing
Example screens of the issue:
Thank you very much, I believe in you guys!