Grabbing ledges doesn't work inside tilemaps

[TheRealSoloLeo]

Is there an existing issue for this?

• [X] I have searched the existing issues

Describe the bug

You can't grab ledges of a tilemap object if it has a concave shape

Steps to reproduce

1. Create a platformer character that can grab ledges
2. Create a tilemap with an L (or reverse L) shape and the platform behavior
3. Start a preview and try to grab the ledge of the tilemap object

GDevelop platform

Desktop, Web, Mobile

GDevelop version

5.4.215

Platform info

No response

Additional context

In this video the character started wall sliding instead of grabbing the ledge

https://github.com/user-attachments/assets/85f5d47f-54a3-4a47-87cc-e6d9209dcb90