I think Kerfur-O's pathing got messed up due to some of the recent changes. Been a few times where I've sent it to get hashes or fix a satellite, and it gets stuck while trying to enter the river (for some reason). I'm able to move it away via remote control, but after letting it go it starts making a wide loop only to get stuck at the same spot.
(Spoiler for this next bit)
I'd also gotten the Skerfur-O event. On its conclusion Kerfur-O was waist-deep in the water next to one of the bridges leading to Alpha. Upon interaction, it had only two options - "Turn Off," and "Unequip." Upon turning it off, it completely despawned and left behind the jacket and traffic cone it'd been wearing.