Lag Issues in Packaged Project for Multiplayer (Listen Server vs. Packaged Build)

Hello Unreal Engine Community,

When I play with two players using a listen server, everything works fine without any issues. However, when I package the project and run it, I encounter severe lag and stuttering when both players join the game. This issue is particularly noticeable with character movement and animation synchronization over the network. The players’ characters stutter and the animations play with a significant delay or lag.

To explain the issue in more detail:

When playing through the listen server, there is no noticeable lag, and animations work correctly.
However, after packaging the project and running it, both players experience serious performance problems. Character movement is delayed, and animations stutter.
The issue seems related to network replication and synchronization of animations.
Question: What steps do you recommend to minimize this lag and animation stuttering? Are there any network optimizations or settings that can help resolve these performance issues in the packaged project?

I appreciate your help, thank you!