Unity 2019.1.7f crash because of rigidbodies

Hey, I have a project that is upgraded to 2019.1.7 from 2017.4, i've already fixed all the problems that was in the console, upgraded to the HDRP, etc.

Now I get a crash mid-way though the game and all I know is it's because of the rigidbodies, I don't know exactly what or why.
I have rigidbodies moving on the game from the start, but the crash only happens after a unit dies, destroys itself and releases a empty game object from being its child and enables it, the empty game object contains a shattered version of the unit.
each mesh has its own rigidbody (the unit has one during the game, and on death each piece of debris is a separate game object with a rigidbody)

I tested every line of logic from the function that kills them, all good.
I've recreated the crash by hand during playmode, here's a video:
the crash happens when I hit "Delete" on the unit.

also attached is what I could get from VS, though it doesn't tell me much.
anybody knows whats up with this?, any help is appreciated.

 

Huh,

edit:
So I "solved" it for now by not destroying the main object but disabling it and when the match is over I make sure I destroy the derbies before the main object.

Lucky this project can take it as each match about 10-15 minutes before you return to menu and I clean up everything, but this problem can wreck havoc on other projects.