Quick answer: Construct 3 Photon multiplayer state updates arriving out of order on high-jitter connections? Photon doesn't guarantee order on unreliable - use reliable channel for critical state.
Player health updates arrive out of order; current HP reads stale.
Use reliable for critical
Reliable channel for HP; unreliable for positional. Per-type policy.
Or version state
Each update has a version number; reject older.
Audit state-update types
Per-type reliability. Reliable is more bandwidth but in-order.
“Network reliability is a choice. Pick deliberately per state type.”
If your multiplayer has order-sensitive state, the reliable channel is mandatory.