Service Fabric - "object is closed" exception via ActorProxy - azure-service-fabric

Question

I'm catching the following exception on my cluster, randomly when an actor calls another one via ActorProxy:
System.Fabric.FabricObjectClosedException: The object is closed. ---> System.Runtime.InteropServices.COMException: Exception from HRESULT: 0x80071BFE
at System.Fabric.Interop.NativeRuntime.IFabricKeyValueStoreReplica6.CreateTransaction()
at System.Fabric.KeyValueStoreReplica.CreateTransactionHelper(KeyValueStoreTransactionSettings settings)
at System.Fabric.Interop.Utility.WrapNativeSyncInvoke[TResult](Func1 func, String functionTag, String functionArgs)
--- End of inner exception stack trace ---
at System.Fabric.Interop.Utility.WrapNativeSyncInvoke[TResult](Func1 func, String functionTag, String functionArgs)
at Microsoft.ServiceFabric.Actors.Runtime.KvsActorStateProvider.<>c__DisplayClass14.b__13()
at Microsoft.ServiceFabric.Actors.Runtime.ActorStateProviderHelper.d__61.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.ServiceFabric.Actors.Runtime.ActorStateManager.<ContainsStateAsync>d__17.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at PosteItaliane.Sin.StateManagement.ObservableState.SingleValueWrapper1.d__2.MoveNext() in C:\Users\maurosag\Source\Repos\Equitalia3\SIN\PI.Sin.StateManagement\ObservableState\SingleValueWrapper.cs:line 21
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at PosteItaliane.Sin.Utility.ServiceFabric.StatefulActor`1.get_State() ....
Searching on the web, i cannot figure out how to resolve it; the only discussions concern with Powershell exec:
“This means that this replica got demoted from primary to secondary. The client will re-resolve and reconnect to the new primary if you let the exception bubble up. The existing processing will drain on the primary. I am resolving the issue as "By Design". Please feel free to reopen if you still have question.”
Anyone can help me?
Thanks in advance.