philip,
i saw bounces of the most closely monitored, by my systems, of my probes between Apr 10 01:17:38 and 01:19:57. the others are on homey openwrt boxen which do not monitor closely. Can you give a bit more details? I found one probe that disconnected from its controller around that time. But is seems to disconnect more often. But nothing specifically for that interval.
the switch to which probe 2285 is connected logged the following: Apr 10 01:17:38 sw0.sea.rg.net 3081: Apr 10 01:17:37.570: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/19, changed state to down Apr 10 01:17:40 sw0.sea.rg.net 3082: Apr 10 01:17:39.575: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/19, changed state to up Apr 10 01:19:55 sw0.sea.rg.net 3083: Apr 10 01:19:54.189: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/19, changed state to down Apr 10 01:19:57 sw0.sea.rg.net 3084: Apr 10 01:19:56.194: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/19, changed state to up randy