Rotating or flipping tiles in tiled doesn't work when using collisiondata and Matter physics

Version

• Phaser Version: 3.86.0

Description

I am using Phaser with Matter physics. I use tiled to create tilemaps and add collision data/boxes in this software. When flipping or rotating the tile in Tiled, Phaser gives an error.

Example Test Code

const map = this.game.make.tilemap({
    tileWidth: 16,
    tileHeight: 16,
    key: "MyMap"
});
map.addTilesetImage("tileset", "tileset", 16, 16);

const layer = map.createLayer(layer.name, ["tileset"]);
layer.setCollisionFromCollisionGroup();

this.matter.world.convertTilemapLayer(layer)

Additional Information

This code works fine when using a map without flipped tiles, it also works with flipped tiles that don't have collision data on them. But as soon you add a tile with collision data flipped (or rotated) it stops working.

A workaround is to add all tiles in each orientation in the tile editor, but I hope this issue can be solved in Phaser to keep tilesets smaller.

Start by reproducing the issue with the shown tilemap setup, including a rotated or flipped tile with collision data, then trace the map.createLayer, setCollisionFromCollisionGroup, and matter.world.convertTilemapLayer entry points. Done means flipped and rotated collision tiles convert without an error while unflipped collision tiles continue to work.