We might see this next week, but supposedly the counter we see reaching zero in the preview is from a different bunker. So we might find out what happens when that one reaches zero, but not our counter. Who knows.
This information is based on the fact that the counters look different. Here are the two images:
The counter we know:
The counter from the preview:
I got these images from
The Tail Section. Sorry if this should be in a different thread.