NASA Regains Contact with Mars Helicopter Ingenuity

Communication was lost during the helicopter's 72nd flight, but was reestablished after two days; cause of the dropout is under investigation.

NASA's Ingenuity Mars helicopter lost communication with the Perseverance rover during its 72nd flight, but contact was reestablished two days later.
The communication loss occurred during Ingenuity's descent after it reached its predetermined altitude of 40 feet.
The Perseverance rover was able to reestablish contact with Ingenuity after performing long-duration listening sessions for the helicopter's signal.
NASA's Jet Propulsion Laboratory is currently reviewing the data from the flight to understand the cause of the unexpected communication dropout.
This is not the first time Ingenuity has experienced communication issues, but it has always managed to return to flight.