Enabling collisions on file loaded from Blender

I am loading a .bablyon file created in blender using BABYLON.SceneLoader.AppendAsync()
and then set the checkCollisions for each mesh on loading.

scene.meshes.forEach(function(mesh: BABYLON.AbstractMesh){
    mesh.checkCollisions = true;

I am also setting scene.collisionsEnabled = true; and camera.checkCollisions = true; with my UniversalCamera but then I can walk right through the meshes. The only mesh that has any effect is the ground plane that was in the file. Any suggestion?

The exporter has custom properties for meshes. This is one of them. This is for an individual mesh. Gives you the control not to do all, but you must select it for each mesh

Check collisions