Did anti-drone technology disrupt Melbourne Grand Prix practice?

GPS problems in Melbourne caused a practice to be red-flagged, and “reasons” are being touted. The news comes on the heels of TikTok video of rooftop Australian Police touting a DroneGun Tactical, made by the Australian-American company DroneShield.

The GPS disruption stopped teams from knowing where their cars were on the track and caused a separation safety issue. So the practice was halted.

I wonder though, GPS drone jamming gun appears and systems fail. There are many tall surrounding buildings at Albert Park, have they been affected by policemen firing RF around?