Roll back your changes, Plarium
Let me tell you, as a dev with almost 20 years of experience - if I shipped code with this many problems, I'd be lucky to keep my job, and the very first thing I'd be doing is immediately pushing a rollback, followed by a strongly-worded apology.
There are so many problems with this latest update, that it really isn't acceptable to just say "you'll be watching and fixing things if necessary". Roll it back, admit you messed up, and fix it properly when you've had time to debug and figure out what messed up.