Alice can just make out the sound of a large cat, perhaps one of the mechathereal variety oddly wearing women's underwear, trying to attack the bulette outside the room. Maybe managing to grapple it, maybe biting it successfully, but a bulette is tough and is probably not going to be taken out quickly and bites hard but can't really attack anything grappling it due to it's poor body shape and limited reach. It could be that the loud bang that was heard was the bulette slamming against the wall in hopes to dislodge its rider.

Alice attacks the bugbear who already took damage with her spear 2-handed followed by Flurry of Blows, expending 1 Ki point.
Alice misses every attempt to strike the bugbears with effect. Deflecting off their tough armor and hides.

The bugbears attack with flanking.
The first blow is deflected (2nd out of 3) and hits the second bugbear doing 13 blunt damage. The second attack hits Alice dealing 6 blunt damage after her resistance.

Seeing Alice shrug off their attacks, they switch to daggers and begin their attacks renewed using extra attack.
Unable to deflect again this turn, she takes the full brunt of the attacks taking 20 slashing damage and is down to 4HP.