I only now caught up with the 1.14 snapshots and experienced a strange behaviour concerning minecarts and curved rails.
I loaded up a few worlds I last played in 1.13 or prior and in every one of them minecarts won't go past a curved rail. Straight tracks work just fine - powered ones as well as normal ones.
The bug persists even after breaking and replacing the rails as demonstrated in this video: https://www.youtube.com/watch?v=GyTBt6OOP-0
Related issues
duplicates
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im having same issue but it doesnt bug on corners going right just going left

i have the same issue , sure hope this is fixable
This bug was already resolved as fixed, which means it should be fixed in the snapshot next week.
Duplicate of MC-144605