COA112 Abrupt Altitude Changes

Looking at the track log for COA112 last night, 10/22, there’s an abrupt altitude change 15 minutes into the flight. I see a similar situation on 10/19 for the same flight. Note the time gap between the higher flight level reported and the drop in altitude. What gives?

Example: flightaware.com/live/flight/COA1 … /KEWR/EGLL

Theres a several minute gap in the radar returns when it gets handed off…so the radar returns get funky.

Example: flightaware.com/live/flight/COA1 … /KEWR/EGLL

Theres a several minute gap in the radar returns when it gets handed off…so the radar returns get funky.

It’s a display bug on our part when there’s a gap in radar positions and we have to estimate.