After evading the Trade Federation blockade, Padmé and her chums make an emergency landing on Tatooine. Sidious and Maul are hunting for them and appear to use a transmission from Sio Bibble as bait to get her to respond. Obi-Wan immediately spots that it's a trick and he and Qui-Gon are equally emphatic that no reply be made because it could cause a "connection trace" that could be used to track them.
BIBBLE: ... cut off all food supplies until you return.. .the death toll is catastrophic.... we must bow to their wishes, Your Highness.... Please tell us what to do! If you can hear us, Your Highness, you must contact me....
OBI-WAN: It's a trick. Send no reply.... Send no transmission of any kind.
INT. ANAKIN'S HOVEL — MAIN ROOM — DAY
QUI-GON listens to his comlink. OBI-WAN is in the cockpit.
OBI-WAN: ... the Queen is upset... but absolutely no reply was sent.
QUI-GON: It sounds like bait to establish a connection trace.
OBI-WAN: What if it is true and the people are dying?
QUI-GON: Either way, we're running out of time.
In the very next scene, however, we learn that Maul and Sidious have still managed to trace them.
How was this accomplished? Did the Queen respond without telling the Jedi?