When networked entities are added by loading a scene additively, mind that the CoherenceMonoBridge must be set to a singleton mode. In case of a non-singleton monobridge the Entity will search for a monobridge instance within its scene, and if none is found it will be created in that scene. This applies to both CoherenceSync and LiveQuery objects.
For a complete control over CoherenceMonoBridge resolving you can use either CoherenceSync.MonoBridgeResolve instance event or MonoBridgeStore.MonoBridgeResolve global event. A CoherenceMonoBridge instance provided by the MonoBridgeResolve event takes precedence over the scene and singleton ones.
Sometimes packages cache gets staled and after updating coherence package you might face Unity still uses the old package version. Try to Reimport all or closing the project, deleting Library folder, and reopening the project again. It will clean and update packages cache, and use the version of coherence stated in manifest.json.