TypeError: Cannot read property 'roundTripTime' of undefined
    at /service/node_modules/mongodb/lib/core/sdam/monitor.js:226:31
    at MessageStream.messageHandler (/service/node_modules/mongodb/lib/cmap/connection.js:277:5)
    at MessageStream.emit (events.js:315:20)
    at processIncomingData (/service/node_modules/mongodb/lib/cmap/message_stream.js:144:12)
    at MessageStream._write (/service/node_modules/mongodb/lib/cmap/message_stream.js:42:5)
    at writeOrBuffer (internal/streams/writable.js:358:12)
    at MessageStream.Writable.write (internal/streams/writable.js:303:10)
    at Socket.ondata (internal/streams/readable.js:719:22)
    at Socket.emit (events.js:315:20)
    at addChunk (internal/streams/readable.js:309:12)