One obvious troubleshooting step is to do a 40 second reset. Downside is the reconfiguration that would need to be done.
How to Reset a My Cloud (single bay) Device
https://support-en.wd.com/app/answers/detail/a_id/24022
Two troubleshooting steps to try before doing a 40 second rest. First, select the Rebuild button on the Cloud Access Connection Option dialog box and then select Save and see if the issue persists. Second, change the Cloud access Connection Option from Auto to Manual. The set two alternate external access ports. One would also have to configure those two alternate external ports in their network router to port forward the external ports to the My Cloud internal ports. I did a general DIY on how to use the Manual setting for Cloud Access Connection on a first gen single bay My Cloud. See the following link:
