The bug
When a minecart falls off a rail, it does not align with the direction it fell but turns slightly.
Affects minecarts travelling north or south as well as east or west. The direction that the minecart turns to might be related to the north/west rule.
After some time, or reloading the chunks, the minecarts correct themselves.
Video: http://youtu.be/YgBn1UyV6hQ
Related issues
is duplicated by
relates to
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Cannot reprodue.The minecart snaps to the tracks, even if the dispenser is perpendicular to the tracks.See screenshots

Works even if the track are surrounded by blocks like in your setup

i will make a video to explain better what the glitch is.

Kumasasa, this bug is about Minecarts going OFF the rails changing direction. (They are fine while on the tracks, but once they leave them, they angle very strangely.) I can certainly confirm this.

Ok, got it.
But still cannot confirm.
Regardless if minecarts change angle, when thay fall on tracks, they snap again to the tracks.

Kumasasa, you still don't quite get it. The minecarts turn a strange angle when off the tracks, which can cause dispenser problems. It has nothing to do with them not returning to rails.

Ok, giving up.

Confirmed, seems to be directional bug. Minecart going off track to the North/South turns slightly, while East/West seems fine. Adjusted title.

the weird thing is that it didnt do that in previous minecrafts, so it does have to do something with directional code of minecarts

I have seen this as far back as the 1.3 snapshots and it propably existed earlier. Can someone please remove Kumasasa's screenshots?

It was always an issue in multiplayer, so after the merge in 1.3 the problem came to singleplayer.

But Tails does.

Screenshots deleted.

Thanks.

This will probably be fixed when they release the 1.5 minecraft 'Redstone update', as they are updating minecarts etc

As this bug still exists in the latest snapshots, i want to add that it is direction dependent. In East-West direction the cart doesn't turn and falls straight off a rail. In north-south orientation it turns to the left.

Still a concern in 14w08a.

still an issue in 14w11b: http://youtu.be/do9Czzk15Y8 (may still be uploading, my internet sucks)

And in 14w21b.

Confirmed for 1.8, only happens with North/South rails and turns to the west.

Confirmed for 1.9-pre1. As said previously, it only affects minecarts travelling North or South, and in both cases they turn towards West. It also affects all minecart variants. After waiting a while, or reloading the world/chunks, the minecarts correct themselves, and face the correct direction.

Affects 1.13-pre7

Can confirm it is present in 1.12.2

Affects 1.13-pre9

Confirmed for 18w48a

Can also confirm

Confirmed for 18w48b

Confirmed for 18w49a

Confirmed for 18w50a

Confirmed for 19w02a

Affects 1.14 prerelease 4
Confirmed for 20w30a

The issue in the MC-82647 bug report is a slightly different scenario, although similar. This report shows that the cart rolls off of the rail and turns slightly. In the MC-82647 report and also my issue (1.16.1), we remove the rail beneath (that person used a piston and I mined the rail) and the cart instantly (no actual turning viewed) changes direction (90 degrees). So I do not see how this is considered as a duplicate or that the MC-82647 report as being resolved.
Can confirm for 20w48a.
Can confirm in 21w05b.

Can confirm in 21w06a

Can confirm in 1.17.1 Pre-release 1.

Can confirm in 1.17.1.

Affects 21w40a

Affects 1.18

I can no longer reproduce this issue in 1.18.1

I can still reproduce this issue in 22w18a.
Can confirm in 1.19.
[media]
Cannot reproduce either. Seems to have been fixed at some point between 23w12a and 1.20.2.