Collision Polygon with Mesh Billboard

I just realized that if you make a 2x2 billboard with a mesh the collision polygon essentially becomes a single line, which is not real useful.

So if you want collisions for that object you have to use a dummy, also not great.

The question now is, can we have a setting to not use the mesh altered collision polygon?

I don't see an issue with this, unless there are plans to have actual 3d collisions.¯\_(ツ)_/¯

Edit:

Also the same thing happens to non Sprite objects. The bounding box becomes... well a collision polygon, but one that's a line for billboards.

Edit 2:

Another thing to mention is that this also applies to Shadow Caster.

I can think of a lot of scenarios where you would want the collision polygon rather than the altered mesh for a shadow.