This ticket reports the same issue as MCPE-157781 but for Java Edition. Before snapshot 23w12a, mounting a rideable entity played a short animation of the player moving toward it. As of 23w12a, this animation is missing.
How to reproduce
Summon a rideable entity (minecart, boat etc.)
Mount it
Expected result
Mounting the entity would show a brief animation of you moving toward it, as it did before 23w12a.
Observed result
Mounting the entity no longer plays a quick animation of you moving toward it.
Linked issues
Attachments
Comments 2
Thank you for your report!
After consideration, the issue is being closed as Working as Intended.
Please note, that mechanics of the game may change between updates.
Things such as graphics, sounds, world creation, biomes, redstone, villagers, and animals may not work the same in current versions.
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Can confirm.