[Godot v4.4] Loading a scene using "ResourceLoader.load_threaded_request" using (subthread = true) causes cascade of "Invalid Task ID" errors

[LunaticWyrm467]

Tested versions

• Reproducible in: Godot v4.4 Stable
• Does not occur in: Godot v4.3

System information

Godot v4.4.stable - Arch Linux #1 SMP PREEMPT_DYNAMIC Fri, 08 Nov 2024 17:57:56 +0000 - X11 display driver, Multi-window, 1 monitor - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 3050 Laptop GPU - 11th Gen Intel(R) Core(TM) i5-11260H @ 2.60GHz (12 threads)

Issue description

Using ResourceLoader.load_threaded_request(level, "", true) to load more than one scene at a given moment will result in the following error cascade:

This issue used to exist before 4.3 Stable (bug report can be found here: #94018 ), but was later reintroduced in 4.4.

Steps to reproduce

Simply run the MRP. The errors will be visible in the editor.

Minimal reproduction project (MRP)

mrp-resource-loader.zip

[matheusmdx]

Regression between 4.4 dev1 and 4,4 dev 2, bisecting.

[matheusmdx]

Bisected to commit 28619e2 from pr #94169 as the culprit, CC @RandomShaper

[Fifut]

I have the same issues but without sub threads enabled.
Append 7 times on 37 call of load_threaded_request()

E 0:00:01:585 ResourceLoaderManager.gd:98 @ _process(): Invalid Task ID
<C++ Error> Method/function failed. Returning: ERR_INVALID_PARAMETER
<C++ Source> core\object\worker_thread_pool.cpp:369 @ WorkerThreadPool::wait_for_task_completion()
<Stack Trace> ResourceLoaderManager.gd:98 @ _process()

E 0:00:01:504 WorkerThreadPool::wait_for_task_completion: Invalid Task ID
<C++ Error> Method/function failed. Returning: ERR_INVALID_PARAMETER
<C++ Source> core\object\worker_thread_pool.cpp:369 @ WorkerThreadPool::wait_for_task_completion()