[atlas] Possible issue with DNS/tests getting stuck?

Dear all, I have a statically configured probe, FW version 4270. If the internet connection goes down/flaps the probe seems to get confused and stops communicating (is shown as Down) even when the connection is back up and stable, but can actually be pinged etc from inside and outside my network fine. I have a second probe that is on DHCP (FW 4280) on a different network, this one seems not to have the same issue, don't know which is the important differentiator. Wondering if anyone has similar issues and a solution other than switch it off and on again. Thanks to All, Kyriacos