TNT entities dont properly collide with blocks , when being fires in X direction

If a tnt entity collides with a block in  X direction, in the first tick after being accelerated
, it does not loose its momentum
and keeps flying in the X direction, until it collides a second time.,

however if you flip this contraption 90°, and accelerate the tnt torwards Z direction
its Z-motion is stopped from the first collision

https://streamable.com/mit1j