A problem in which the procedural leg operates abnormally on the client

I watched a procedural animation tutorial on YouTube and followed it, and it works very well. However, it is only normal on the server side, and when viewed from the client, the IK target is pushed back, making it look like a long jump. This NPC with procedural animation follows the player and the game is a multiplayer game. I don’t know if it’s a bug, but I’d like to see this resolved.

In Server

In Client