A boat picked up in a minecart affects the motion strangely. Rowing forward seems to reverse the minecart direction.
A boat with chest is even more random. If moving along a rail e.g north initially then taking a u-turn (now travelling south) the minecart motion reverses after a while and will continue to oscilate if turning the u-bend.
Both boat types (with/without a chest) cause a minecart to keep thier momentum if exited while moving.
Linked issues
duplicates 1
Comments 4
Duplicate of MC-113871.
You can also upload it to YouTube or another file/video sharing service and link to that here if that's easier.
But yes, this is the same as MC-113871, so resolving as a duplicate.
I was able to upload my demo to imgur: Here is a video of the strange motion
Apologies, I recorded a video of gameplay - I am just working out how to shrink the file size.