I'm not sure if it's intentional, but there is some subtle difference between moving animation in Minecraft 1.13 (and lower) and 1.14+ versions.
https://drive.google.com/file/d/1S0Z9zZJvlT1EQu3EXkgAefKHNctMMYyK/view?usp=drive_link
https://drive.google.com/file/d/1IxCXBFi5NFEvHhz95nBlL7T6t5E23G8l/view?usp=drive_link
Thank you for your report!
We're tracking this issue in MC-153312, so this ticket is being resolved and linked as a duplicate.
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