DNS missing due to Services Limit

Hi Everyone, 
  One of our Node (k6irf-harpusa-hap-ac) DNS changed to an IP address. 
I did some research and found some older post on the OLSR restart fix. This fix did not work for this node. 
Then we noticed adding more than 15 services would do this. Is there a limit to the number of services we can add per node?   
 73 Lot / k6irf