net 2.5.6 : When remote connection drops, sdk throws unhandled exception on Asynchronous KV

with current master as of 3/8 (45e84c66d0dc4818d8fdfcf7276835ceaa85614a),
Against server 4.6.3
When all connection to nodes drops, sdk throws unhandled exception at MultiplexingConnections.cs line 187. Call stack does not reflect what operation it was but I think it is get or upsert. Regardless, this happens on Asynchronous operation.

StackTrace:
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at Couchbase.IO.MultiplexingConnection.ReceiveThreadBody()

Exception message:
_message "A blocking operation was interrupted by a call to WSACancelBlockingCall"