A bug found in NGO

I’ve found a bug about boarding gates. It seems like it is suspended in the air not on the ground. Did anybody notice that? And anyone can fix it?
The game is on the iPad. Thanks.
I don’t know where can find them so can you help me

Here is the screenshot.

If you blow up you can see the problem.

Report to the devs using the process in the pinned post in the section