So are both bands under the same SSID? If so, then that is the issue, and it was just a matter of time before things started not to work. The best thing to do is to split the bands, and then that issue will go away. The strips are not compatible with devices that put out one SSID for both bands.
https://www.coralvuehydros.com/product-support/hydros-control/wifi-constantly-dropping/