I have to stop and start the GLDDNS application for it to work. Restarting the router does not help. It works for a day the next day back to square one it does not resolve.
Tried searching for the issue no luck finding a fix.
This appears to be a known issue where restarting the device causes DDNS to stop working.
Our development team has already implemented a fix, which will be included in an upcoming release.
In the meantime, please refer to the workaround described in the following post: