NetFlow IP addresses

NetFlow IP addresses

Hi 

Long story short, I have two interfaces in my ASA which I am monitoring. Everything works but I don't see the IP addresses when I go to Source, Destination nor Conversation. I clicked Resolve DNS but don't see the IP addresses I edited the Interface parameters and used 8.8.8.8 DNS and for a few minutes I could see the IP addresses but after a while they disappeared again. What am I doing wrong? All inputs are appreciated. 

Please let me know if you need more info, thanks!

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