The bug
When pushing a minecart into a turn with powered rails around a cauldron full with lava, the minecart pops off the track. I assume this is because the hitbox of the minecart intersects with the lava's "damage zone.
How to reproduce
Place cauldron. Fill with lava.
Place a powered rail facing perpendicularly away from it. Create a track around the cauldron.
Power the powered rails. push mine cart along track.
Related issues
duplicates
Attachments
Comments

[media]

Can confirm.

Relates to MC-7464

Relates to MC-165330