Non-host clients unable to move after updating to latest Live build

After installing a sub-1GB Live update released shortly before the planned SPS broadcast, non-host players (clients/participants) can join multiplayer sessions but cannot move. The server host can move normally. This regression was observed across multiple modes (Arena Shooter and Racing) and on both private and public servers; prior to the update, participant movement worked correctly.

1. Update the game client to Live build CL117-Discovery-Admission-20261004-r1.
2. Start/host a multiplayer server session.
3. Have one or more additional players join the session as non-host participants (clients).
4. Attempt to move as the host and as a participant, then compare movement behavior.

All connected players running the current build should be able to move and play normally, regardless of being the host or a participant.

Title

Non-host players cannot move after updating to the latest build

Category

Gameplay / Multiplayer / Networking

Severity

Critical

Version Live: CL117-Discovery-Admission-20261004-r1

Affected modes
Arena Shooter
Racing
Affected environments
Private servers
Public servers
Description

After a game update of less than 1 GB was released shortly before the planned SPS broadcast, participants who installed the update could join multiplayer sessions but were unable to move.

The server host could still move normally.

Before the update, participant movement was functioning correctly.

Steps to reproduce
Start a multiplayer server.
Have multiple players join.
Ensure the participants are running the latest build.
Compare movement between the server host and connected participants.
Actual result
The host can move normally.
Updated participants can join the game.
Updated participants cannot move.

The issue was observed in both Arena Shooter and Racing, and on both private and public servers.

Expected result

All connected players running the current build should be able to move and play normally, regardless of whether they are the server host or a participant.

Impact

This prevents multiplayer participants from playing normally and can make multiplayer sessions and broadcasts effectively unusable.