In any case, the console update, if we are talking about it, does not affect the operation of the paddles in any way. Do a factory reset. Re-flash the firmware on the paddles, the January one works fine. After that, be sure to do a self test, during it the paddles will adapt the buttons.
If the problem persists, then either the problem is in the connection and you have a loose cable or shorted wire, or the "share" button itself is seized or shorted.