Object collapses in edit mode

Asset that collapses in edit mode

Anyone got any idea what is going on here?
This game asset looks ok in object mode but collapses in edit mode. No modifiers.

Perhaps there is a shape key in it. Because if it s selected in your mesh pannel while you edit object. It ll be shown.
But only a supposition. Post blend for deeper investigations.

Blend is above if you still want to look, but you got it right, thee is indeed a shape key in it. I can only guess my son was working on it and added it for ingame destruction/creation. Thanks for loking @skuax

i thought it look like an explosion