Yes, well aware, and I will dig deeper into it, since we would like to re-enable L2 caching. 

Another issue we observed when using the L2 cache in our Apache Isis app was that sometimes (?) when an object could not be found in L1 and L2 and was added to L1 the postLoad event was not triggered. Since in Apache Isis dependencies are injected into entities through this event we had cases in which the dependencies were null. In such cases the state of the object was "hollow" (as opposed to "persistent clean"). Also haven't had time to dig deeper into this.