I was just making a Tower Defense map, And randomly. My devices stopped working. I checked around through all my devices deleted some stuff. Still couldn’t find it. But then, I went to the creature spawners and it said (Unknown Device). I am pretty sure this broke my game. I couldn’t remove the (Unknown Device) from the creature spawner. 
Thank you.
@Thump3rnz Thank you for your report! Can you please re-post using the “New Issue” option on the Issues and Bug Reporting forums? Posts with this feature are connected directly into our development team so we can quickly get to them!
For more information, such as how to get the reference ID, please check out the article here: Using the Creative and UEFN Bug Reporting Form