Error running event "irc.registered"

[ChrisBuchholz]

Whenever I launch circe and connect to the bouncer servers I have set up, I get the following error:

Error running event "irc.registered" handler irc-handle-auto-join--registered: (error "Argument must be a string") (args were (#<process bnc.irccloud.com<1>> "irc.registered" "xxx"))

However, everything seems to work fine. But the error message persists.

The way I connect to servers is with the following template:

        ("IRCCloud xxx"
         :host "bnc.irccloud.com"
         :server-buffer-name "xxx"
         :port 6697
         :tls t
         :nick "xxx"
         :pass "xxx" 
         :channels ("#xxx", ...))

Any idea what it is?