When you unload and reload chunk a boat is in, or exit a world while in a boat, that boat will change it’s rotation as following
the rotationg gets rounded down to closest 1/256th of full circle
Steps to reproduce:
place a boat down
enter boat
don’t turn(either with mouse or with move left/right hotkeys) and run /data get entity @s Rotation[0]
take that value and put it in calculator, divide by 360 and multiply by 256 (most likely won’t be a whole number, meaning that the boat’s rotation wasn’t rounded as described above)
quit the world while in boat
open world again
repeat steps 3. and 4. (you should get whole number, meaning that boat’s rotation rounded as described above)
Comments 3
Thank you for your report!
We're tracking this issue in MC-301329, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
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The MC-301329 is about “rounding” not happening upon placing a boat down. “Entities are not expected to round to any particular angle steps when placed”. so yes, it is working as intended. This Bug report is about “Them changing directions through save/load” which “is more likely a bug.”
Please edit your report to change the Affected Version to the version shown on the Minecraft title screen