Minecarts cannot go around turns

I was trying to make an adventure map in which the player must push a mine-cart along a track; but the minecart will not go around turns at all; and if pushed hard enough, may even derail- with no success in trying to roll it around a turn.
 
What I expected to happen was...:
I expected the cart to behave as it normally does: to ride around the curved track with no issues.
 
What actually happened was...:
the cart behaved as though pushing against a solid block or another entity, and derailed when pushed hard enough.
 
Steps to Reproduce:
1. make a curved minecart track; possible re-creating the scenario pictured in the screenshot (abandoned mineshaft with some of the rails pre-existing)
2. place any minecart type on it
3. push the cart along the track without getting into it
4. observe the cart's strange behavior
 
 
Version: 19w09a