Label3D inside SubViewport goes grey when resizing window with stretch mode canvas_items

[GabeJWJ]

Tested versions

• Found in Godot v4.2.2.stable (210e8b958) with GodotSteam built-in, reproducible in vanilla Godot v4.2.2.stable and Godot v4.3.stable

System information

Godot v4.2.2.stable - Windows 10.0.19045 - GLES3 (Compatibility) - NVIDIA GeForce GTX 1070 Ti (NVIDIA; 31.0.15.5186) - AMD Ryzen 5 5600X 6-Core Processor (12 Threads)

Issue description

I have 3d objects (including Label3Ds) in a 2d scene using a SubViewportContainer. I have my stretch mode set to canvas_items. I resize the window, and the Label3Ds go grey and never come back. Looks a lot like issue 63507, but I have confirmed the SubViewportContainer is necessary.

Steps to reproduce

To re-create the MRP:

• Create a simple 2D scene with a SubViewportContainer and a SubViewport
• Inside that Subviewport, create a simple 3D scene with camera pointing at a Label3D with text on it
• Set Project Setting display/window/stretch/mode to canvas_items

Now you have the same setup as the MRP. Finally to get the broken behavior:

• Launch the game and resize the game window

Minimal reproduction project (MRP)

mrp.zip