When rideable minecart is on powered activator rails it looks like it is being constantly damaged.
I know that in this case activator rails eject mobs and players from minecart, but I didn't expect that additional behaviour of minecart.
I'm not sure if this is a bug.
(Sorry, if English is bad)
Linked issues
duplicates 1
Comments 2
Duplicate of MC-71124. The shaking animation is intended.
This is not a bug, the effect shows the entity in the minecart being 'shaken' off by the activator rail. This is similar to how boats and minecarts look when they are damaged.