Online percentage went down even though node is constantly online

It’s not so sensitive (because it’s calculated over last 30 days), you need to check the audit history, you may just open the link in the browser, to see all time windows.
http://storj1.internal:14002/api/sno/satellite/12EayRS2V1kEsWESU9QMRseFhdxYxKicsiFmxrsLZHeLUtdps3S

or with these scripts: