In the video, the two minecarts At this time, the minecarts are moving closer and further apart. This shows that the minecarts do not run at a constant speed.
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I looks like they are bumping each other because of how you set up
the test. Minecarts bounce your off other entities within 0.25 blocks of touching. Can you reproduce the speed differences on parallel tracks?

Sorry for the delay in replying.
Here is the video. Please take a look.

Can you still reproduce this in 1.19.0? I cannot reproduce it in a similar setup to what is shown in your video.
I also think this may be the same issue as MCPE-141920.
Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Incomplete. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.
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