Same here. It started a couple of months ago as isolated incidents but it has gotten progressively worse (almost every couple of days now). Seems to affect certain cameras over and over again, and getting a little tired of seeing that red X. Affecting our: DCS-932L's, and DCS-930L's. Our DCS-5222L seems to be rock solid.
If this is a Wi-Fi connection issue (if it is, the blame is on the camera since the network configuration and environment overall has not changed), the cameras do indeed connect back up to Wi-Fi, but myDlink fails to return to service until a reboot of the camera. Perhaps Dlink should consider improving mydlink communication restoral after a connection interruption?
I have reached out to Dlink but just got numerous replies about how to improve my Wi-Fi connection. I've done all I can in troubleshooting my wireless setup, and I have dozens of devices/smart home products that all communicate without issue, so I'm not going to waste any more time doing that, especially when this points out an overall problem with mydlink communication restoration after a failure.
I'd love to stick with dlink, but I think the only thing that will keep me with them now is if they offer a HomeKit camera sometime soon. That would allow my Apple TV or iPad to act as a more reliable remote access tool rather than the flaky myDlink service.
I've reached out to myDlink support once again. Hopefully we'll get somewhere, because these cameras have been rock solid up until recently.