Rotation of Tile with Navigation mesh using editor causing invalid Polygon data for the mesh

[phill44-source]

Tested versions

Reproducable in 4.2.2 stable

System information

Godot v4.2.2.stable - Windows 10.0.19045 - Vulkan (Forward+) - dedicated AMD Radeon RX 6600 (Advanced Micro Devices, Inc.; 31.0.24002.92) - AMD Ryzen 5 2600X Six-Core Processor (12 Threads)

Issue description

when rotating a Tile with at least one point deviating too much from a simple enough shape (unsure) causes the Engine to bake the navigation mesh of the Tile incorrectly.

In This picture, at the top there are the preconfigured navigation meshes of the tiles, in the lower ones the formers are rotated using the inbuilt tool.

Steps to reproduce

-Make a Tilemap
-Set the Navigation mesh of a Tile, while deviating from a simple shape, preferably sharp/a lot of corners
-Place the tile, rotated

Minimal reproduction project (MRP)

Test-project.zip

[phill44-source]

New addition of an Error:

[libklein]

I can confirm that this is in fact a bug. See the linked PR for details.