This has been a bug for years, all reaching to 2018, when her rework dropped.
If you deploy the teleporter standing close to a wall, terrain, or any other surface thats not flat, it could self destruct - all without providing a refund in cooldown, which is really disruptive to gameplay.
Torb turret is close like this, but it doesnt refund the cooldown, just goes on a 4-5 sec cooldown as the turret didnt fully deploy