Mobile Ambient Occlusion caused renderer Bug in UE 4.27

Hello Friends, i have a small Problem in UE4.27. When I enable Mobile Ambient occlusion, package the Project and launch it on my Iphone, All Objects which receive AO are Invisible!

So it should look like on the Phone

And so it look on the Phone

If Iam Disable Mobile AO in the Project settings, all works fine.

I hope ypou can help me.

Hi, yes we have reproduced this issue and it should be fixed in a next 4.7.1 release.