If the timer runs out in a breachstone do you lose?

Bought 4 breachstones to get some atlas passives, playing minions so clear speed is in the absolute dumpster compared to stuff like spark. My timer went down to 3 seconds in 2 of the 4 runs, so if that went to 0 does that brick my stone and kick me out with no more portals?

The run to the boss was legitmately harder than the boss himself even the last run for the 8th passive.

I just let the timer run out to kill a few rares without thinking it through and it still let me fight the boss.

The boss however was attacking faster than ever, and had energy shield.

So I think not clearing the breach in time may give the boss extra modifiers, but it does not brick the run outright.

I almost killed him despite the mods so it's not impossible or anything near it.

yes if it runs out you lose.

chronomancers should have more time kek

Time is up when I played with my skeletons witch (second attempt).
Did not loose but boss become more stronger compared to my first attempt with light-monk (or so it seemed)