Feeder marked as offline - no inbound messages

A very quick question. Does having no inbound ADS-B messages to the feeder mean that the feeder station shows as offline in the web interface?

I'm currently running three listener stations, one in Ireland and two in Zurich. Both locations have periods of time through the small hours where there are no planes within reach, and dump1090 does not show any messages for several minutes at a time. I've noted that there are significant periods of time during the low-message times where the stations are being marked as offline on the receiver profile page.

Taking both of the receivers in Zurich, there's no real common periods of being offline. The network to the location is GigE fiber and considered very stable. That is definitely not going down for tens of minutes overnight.

Setups in Zurich:
1408234978 : RPi4 4Gb with AirSpy R2, RTL-SDR ADSB-LNA and a tiny FM telescopic whip.
1408234986 : RPi3b+ with an RTL-SDR V3 dongle, and RTL-SDR LNA, with the RTL-SDR dipole kit and short elements in vertical config.

Both of these are feeding a multitude of upstream aggregators - FlightAware, PlaneFinder. FlightRadar24, Open Sky, ADSB-Exchange, ADSB-Hub. None of the other feeders are showing as offline at the same time.

Does the Open Sky data aggregation see the feeder station as offline if it's not actively sending ADS-B data upstream?

-Cathal

Thank you for the clarification, that is indeed useful to know.