[atlas] (not) disconnected probes

Hi, I found that the following probes are reported disconnected for several hours a day, more or less at the same time, but all their built-in measurements are there and seem normal: https://atlas.ripe.net/probes/32639/#!tab-network https://atlas.ripe.net/probes/28818/#!tab-network https://atlas.ripe.net/probes/19107/#!tab-network https://atlas.ripe.net/probes/14831/#!tab-network https://atlas.ripe.net/probes/11982/#!tab-network These probes are in different ISPs and locations in Japan. Any idea why this is happening? something funky on the controllers side? Thanks, Romain