Godot Editor randomly becomes unresponsive in large projects except if Single Window Mode is enabled.

[nan0m]

Tested versions

Reproducible in v4.3.stable.steam [77dcf97]

System information

Godot v4.3.stable (77dcf97) - Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 3070 Laptop GPU (NVIDIA; 32.0.15.6614) - 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz (16 Threads)

Issue description

This issue does never occur if Single Window Mode is enabled in the Editor Settings.

Situations where the editor can randomly become unresponsive:

• Having another window open e.g. Project Settings then clicking on the main Editor Window.
• Having another window open, then minimizing both Main Editor Window + the other window, afterwards maximizing those again the editor becomes unresponsive.
• Clicking on a color in the inspector which pulls up the Color Picker
• Hibernating the Computer with Godot opened, upon starting the computer again the project has become unresponsive.

Factor that I believe influence the frequency of this occurring:

• Doesn't happen at all on an empty & fresh project.
• Seems more likely to happen if a large 3D scene is currently opened.
• Sounds weird, but the more I pull and drag the editor windows around and min/maximize them.

What I have tried:

• disabling all addons
• delete .godot folder
• reinstalled Godot Steam version & deleted editor files.
• updated to latest nvidia drivers
• different display scaling e.g. 100% / 250% (on a 4k monitor)

Nothing is shown in the console even when running the engine with --verbose
The issue started occurring around or shortly before 27 Nov 24.
However all changes in my project relate to .glb files and assets in the project, no tool scripts or plugins et cetera. There were however two windows updates on the same day installed to my pc which could therefore be somehow related:

• KB5046714 link
• KB5048292 link

Seemingly related issues:
#100265
#92148
#89537

Steps to reproduce

havent found any to reliably reproduce it, but still:
using the color picker is likely to induce it.
minimizing & maximizing subwindows and the editor as well.

Minimal reproduction project (MRP)

n/a

[nan0m]

It was a problem with the DebugDraw3D addon. I removed it from the project and while there are hang ups sometimes now in multi window mode, it never enters an infinite loop anymore where I have to terminate Godot.

If you stumble upon the same problem and have DebugDraw3D installed, then remove it. Since it doesn't show up in the list of addons I had forgot to remove/disable it in my testing.