> Apparently, they used to have failures with the clocks
That would explain if a few of them were weird, but the report said "SATELLITE AFFECTED: ALL" which would be quite a coincidence if each clock on each satellite failed at the same time.
The recent update on the report seems to point to an Italian facility that relates to timing though:
> Guenter Hein, Professor Emeritus of Excellence at the University FAF Munich told us, “As far as I know, it is a problem of the PTF [Precise Timing Facility] in Italy – time has an impact on the whole constellation!”
https://www.gsc-europa.eu/system-status/Constellation-Inform...
This is the specific incident: https://www.gsc-europa.eu/notice-advisory-to-galileo-users-n...
Seems to have started 2019-07-11 14:45 (UTC) so a couple of days ago.
Apparently, they used to have failures with the clocks (https://en.wikipedia.org/wiki/Galileo_(satellite_navigation)...) so might be something similar.