With animation smoothing on, the arms and legs just stay in position like they are stuck.

For future reference, it doesn't seem to be Physics mod(neither normal nor pro version).

Same happens here, have you found a fix?

It's some mod messing with the setupAnim method, breaking that NEA knows when it needs to update. Without the info on which mod is causing this, I can't work on a solution.

It's some mod messing with the setupAnim method, breaking that NEA knows when it needs to update. Without the info on which mod is causing this, I can't work on a solution.

Alright. I'm gonna try troubleshooting which mod could cause the issue.

Someone mentioned in a Chinese forum called 'MC Wiki' that this problem might be caused by the 'Rubidium' mod. Please check it if possible.

In my game I installed the 'Embeddium' mod and I have the same animation stuck issue.

Noteworthy that Rubidium and Embeddium are both unofficial and unsupported Forge ports of Sodium.