Sudden descent then all altitudes are "approximate"

FlightAware General
1

In the en route tracker for TAM 8079 this overnight, at 11:03 and 11:11 PM

  1. the rate of descent is sharp, then

  2. there are no more readings for the altitute, and

  3. the reporting facility location/type reading just says “FlightAware Approximate.”

What happened? (My daughter is on that flight!)

Thanks.
Mark

2

Relax, the flight was over water and out of radar range and flightaware’s coverage area. Entirely normal.