Xcode 10 simulator iPad 9.7 vs 12.9 views rendering not to Storyboard's constraints

Is your app being scaled up? What does UIScreen.main.bounds report? Are you using a launch storyboard or separate launch images? What Xcode version? That’s normally how you opt in to new device resolutions - build with an Xcode version that knows about it, and make sure you’re supplying the relevant launch images or storyboard.

I haven't looked at UIScreen.mainbounds report ....but for my launch images, I am using an .xcassets catalog file in Xcode 10.1 for my app designed for for IOS 11.0+. I see in the .xcassets file / my launch Images for ipad landscape, IOS 7.0 or later has only two launch image files: 1x (1024 x 768) and 2x (2048 x 1536). If an iPad 12.9" in landscape is 2732 x 2048, and I'm using storyboard with all necessary constraints .....is the 2x launch screen in my .xcassets resolution forcing contraints to a lower resolution with different constraints?

Any suggestions how to resolve? ...do I need to add a 2732 x 2048 launch screen somehow to .xcassets file or add some device detection code since my ipad storyboard constraints are being ignored in Simulator?

I switched to using a Launch Screen.storyboard ...and now constraints work properly per device. I did not realize that launch screen resolution takes priority over main.storyboard constraints and for iPad 12.9 there is not a resolution its launch image in .xcassets file. Once I changed my launch image settings to use a Launch Image Storyboard ...main.storyboard constraints for all devices then worked fine.

Thanks Junkpile for pointing me in the right direction to resolve my issue. I was updated an older app, that used .xcassets file for launch images that was the root of the problem.