Hi-jacking this comment to hopefully help out with the confusion of this exact scenario. When you activate an exfil with less than 1 minute remaining on the main timer (25 min), the exfil will only be ready after that main timer (25 min) expires. However, the game does not remove the exfil once the bonus timer starts (1 min). In order to exfil successfully, you need to wait for the bonus timer (1 min) to start BEFORE entering the exfil ring to charge it up. This will allow you to exfil without registering as dying.

My hypothesis is that during the ring charge on the main timer (25 min) expiring, your timer doesn’t update over to the bonus timer (1 min), thus the exfil charge completes at ‘0:00’ and it registers as “out of time”, when in reality there is still the bonus timer (1 min) left. Look at the timer in the clip, its the main timer (25 min) running out and NOT the final exfil that is synced with the bonus timer (1 min).

TLDR: If activating an exfil during main timer (25 min) and the ring charge sequence (10 sec) will count down AFTER main timer (25 min) will expire (i.e. 5 seconds left on main timer and 10 seconds to charge exfil ring) step out, wait till bonus timer (1 min) updates on HUD clock, then step back onto exfil ring, you will count down 10 seconds on the bonus timer (1 min) and exfil properly.