I'm unable to catch Cyril in the sewers after freeing him from Rudolph. The game tells me "Unfortunately, you fail to find any room within your soul to support your friend" and he falls into the slime-water. I'm not sure if this is a bug outright as companion capacity seems to be an intended mechanic, but the patch 1.301 notes said the companion limit was temporarily disabled so I figured I'd report the issue here.