It is now an Airbus SOP across all the fleets I have seen. Most recently the LR Fleet in our company has lined up with the A380 and explicitly stated that Idle Reverse cannot be used on Wet runways (or worse). If you haven't seen it yet, then it will be in an upcoming revision unless your Flight Ops department customises it out.
In my view it is an overly restrictive application that arises as a consequence of how EASA certification and operational regs are written.
Consider yourself lucky. At my company it is SOP
not to use reversers, except for a hand full of situations.
