[Hawkular-dev] Inventory - /entity/{path}/treeHash - Cannot cast BaseEnvironments$Single to Synced$Single

I am using the inventory "entity" API - Day1 of using it, so might be a silly mistake. Using services v0.0.12.Final which has v0.18.0Final of inventory. I am able to create and get an entity, but when i try to get the treeHash, i get a cast exception. Server log: - https://gist.github.com/garethahealy/e5004563be11cbc55ea6fcf1bb2907d6 Client log: - https://gist.github.com/garethahealy/e397df61965df7b766b41a30a3f33ca2 This a bug? or am i doing something wrong? Cheers.