minecarts placed on a downwards slope (normal rails) is not effected by gravity, just sits there intill external force move them, same thing happens if their momentum is lost, they just stop and sit there.
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Asteraoth
Thank you for your report!
We're actually already tracking this issue at MC-145638, so we will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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