Worldspace canvas on a stacked camera layer not working (unity bug?)

Hey,

We have a rather complex system, which I'll explain first. Using URP. We have a "PlayerCamera (Head)" which is the main gameplay camera attached to a first person controller. This renders the main view of the world as you move around in first person. This renders defualt layer and a few others.

We have a bunch of playable arcade games which are rendered to texture using various sub cameras (usually rendering a layer called "ArcadeGame").

All good so far.

One of these games is a little more complex. It has a "Main Camera" which renders the "ArcadeGame" layer. There is also a sub camera "Main Camera (2)" that is set to Render Type "Overlay". It only renders a layer called "SpaceAsteroidsPlayer" (ignore the terrible naming) and it is rendering as a stack component of the "Main Camera". The reason for this is that the "Main Camera" is Ortho for the UI/Gameplay but we added a sort of JRPG style world map that needs a perspective camera.

All this is working really nicely... However...

I needed to add some 3D worldspace UI for some text boxes (need to be UI rather than sprites) and even though they're on the correct layer and can be seen in the correct position in sceneview, they don't render in the game view.

I'm pretty convinced it's a Unity bug to do with camera stacking and worldspace UI, since it displays correctly if I set the render type of "Main Camera (2)" to "Base" and give it the render texture as it's output. Bizzarely if I do that, and then switch back in play mode, it works as intended whilst in play mode (but obviously reverts once you stop).

Am I missing something or should I file a report?

 

Having literally the same problem, while all settings are set up correctly

 

Same issue...