Hey CyanBalloon,
I’ve been able to reproduce the issue and have entered a bug report, which you can track the status of here: Unreal Engine Issues and Bug Tracker (UE-35978)
As far as a workaround goes, you could try something like the picture below. I’m not sure how your setup is working, so it may not work in your case, but what I did was basically set the reference first and then set simulate physics to true. That way I already had a stored reference to the mesh. Hopefully that’ll work for you, but if not, I was unable to determine another way to work around it at this time.
Some of it may not be necessary depending on how many components you expect to be contained in the array (such as the check to see if it actually is the static mesh we’re looking for), but it may work in your case.
Thank you for your report and let me know if you have any further questions.
Have a great day