1.5.1

[1.5.1] - 2025-05-06

Added

• Experimental host migration feature added, enabled with the ENABLE_HOST_MIGRATION define but otherwise hidden.
• With ENABLE_HOST_MIGRATION defined, when a client reconnects to a server after disconnecting the connection entity on both sides will receive a NetworkStreamIsReconnected component. An internal unique ID is added to connections to track this behaviour.

Changed

• IsReconnected split into NetworkStreamIsReconnected for reconnected connections and IsMigrated for re-spawned ghosts (Host Migration).

Fixed

• An issue with Mutiplayer PlayModeTool window, throwing exceptions when docked after a domain reload. The issue was due to because of an access to EditorPrefs and Application.productName while restoring the window state.
• Issue where, during host migration, ghosts could be migrated with a 0 id and type. Causing various issues when instantiated on the new host.
• Crash which could happen after host migrations when the server is deploying the host migration data.
• Issue with prespawn prefab entity list initialization after a host migration, the ordering of the prespawn ghosts could be shifted by one because of the internal PrespawnSceneList entity prefab creation. This would result in invalid ghost type X (expected X+1) off by one style errors.