JonneSir

Behaviour changed in 24w36a. Minecarts now appear to exhibit expected(correct) behaviour in the stopping test. Minecarts appear to consistently come to a full stop at unpowered power rails, regardless of inputs made by the player prior to entering the unpowered power rail. Players also do not continue accelerating the minecart indefinitely after movement keys are released (see previous comment on 18/Aug).

The acceleration test still shows that the player is able to accelerate the minecart with movement keys while on unpowered power rails, but I hold that this is intended behaviour, as it can be observed without the minecart experiment, and even in 1.21.1, and 1.19.3.

Can confirm 24w35a

After some testing, the bug here seems to be that the minecart will continue accelerating indefinitely towards the cardinal direction of the user's most recent button press, even after the user has let go of all movement keys. If the user did not press any movement keys while in the minecart, the minecart will consistently come to a full stop at the unpowered rail. For example: if the player is sitting in a minecart and taps the W key while looking towards north, the minecart will continue accelerating towards north indefinitely, even stopping and reversing if required. The effects ceaces if the player leaves the minecart.