application crash, when trying to load MapBox or map with more than 1 patch

[Sythelux]

Describe the bug
When I add my Terrain3D and try to load a map and set the patch size x or y to be above 1 the whole editor crashes after a while. The same thing happens, when I try to load a terrain from mapbox

I tried to troubleshoot it with removing and readding code and can't seem to get it to stop. I suppose it has something to do with multiple Patches using the same Material and accessing the same material ID?

It could also be currently buggy, that we hand down the image by ref. I really have no idea. This stuff is pretty much to high for my knowledge level.

To Reproduce
Steps to reproduce the behavior:

1. see above
2. after a while (usually after a few hundred milliseconds) the editor crashes

Expected behavior
The Editor continues to run and renders the chunks

Desktop (please complete the following information):

• OS: PopOS 22.04
• Engine +version: v4.0.beta.mono.custom_build (e93251e6f96cff29cfc9faed525a496e1d436363)
• (the same happens with Godot 4 beta 2

Additional context
I have the a stack trace here, but it isn't really helpful.

ERROR: FATAL: Condition "!Object::cast_to<RefCounted>(p_ptr)" is true.
   at: godotsharp_internal_refcounted_disposed (modules/mono/glue/runtime_interop.cpp:155)

================================================================
handle_crash: Program crashed with signal 4
Engine version: Godot Engine v4.0.beta.mono.custom_build (e93251e6f96cff29cfc9faed525a496e1d436363)
Dumping the backtrace. Please include this when reporting the bug to the project developer.
[1] /usr/lib/dotnet/dotnet6-6.0.109/shared/Microsoft.NETCore.App/6.0.9/libcoreclr.so(+0x4b536e) [0x7f1467cb536e] (??:0)
[2] /lib/x86_64-linux-gnu/libc.so.6(+0x42520) [0x7f14a3642520] (??:0)
[3] /opt/Godot/Godot_v4-master_x11_64/godot.linuxbsd.editor.x86_64.llvm.mono(+0xc9880f) [0x5610f282c80f] (??:0)
[4] [0x7f13f0544d5d] (??:0)
-- END OF BACKTRACE --

[Sythelux]

I have progress on this topic. I make it together with this pull request here: #16

It isn't supposed to load the same one 3 times and they are also not supposed to have different height offsets, but I'll get that working as well.

[Sythelux]

Should be fixed with Godot-4.1, but needs verification