Known issue with URP: Controlling UI editing

Hey there,

I watched your movie on Upgrading your existing project to Universal Render Pipeline - Unite Copenhagen (30.9.19) and at the end Yilmaz is mentioning "controlling UI editing" (besides camera stacking) as a known issue but is not really ellaborating on this.

What does it mean? In which way will my in-game UI will be affected? What won't be possible anymore?

I'm quite new to Unity and plan to do an AR app for iPad Pro with Unity still not being sure if to use Standard or Universal Render Pipeline and am a bit concerned about getting stuck with URP in the middle of the project.

Thanks for your help!
André