[FIXED WITH SOLUTION]Spawn Gem after Block destroyed doesnt spawn properly

Hello,

Im trying to use the Spawn Gem function if a Block is being destroyed,

It spawns inside the destroyed Block, but it glitches around and hops around, etc not very vanilla like drop behaviour.
I tried to work with the /summon command but the problem remains still.

Any way to fix this properly except for spawning it one higher or lower?

Solution:

If you want to spawn your Item in the middle of your destroyed Block or just in the center use this: