Fungal Folly delve - Unable to interact with scouts

I’m doing the scout rescue in Fungal Folly. I’ve rescued 4/10 scouts and arrived at a bunch of them huddled up near the mid-delve respawn point. I killed the adds that appeared, dealt with the Underpin guys Brann pulled unnecessarily, and now cannot proceed with the quest anymore. None of the scouts are clickable.

I’ve been standing there trying to click them for a good few minutes, adds keep spawning on me out of nowhere, Brann keeps dying, there’s no way to get out of this situation.

Anyone else had the same experience? The only “solution” I’ve found was to die and abandon the delve.