I think "slowed down" is a strange description of what happened, which is that it was cut off above a certain speed limit. As in a terminal physically traveling faster than (IIRC) 100 miles per hour would shut off.
Perhaps also worth noting that Starlink is used only for defensive purposes, specifically against "Shahed" drones, which have top speeds of 340 km/h (210 mph). Restricting the speed is effectively helping Putin/Russia murder civilians.
[0] https://www.telegraph.co.uk/world-news/2026/10/16/musk-appro...