Have to read the FCOM really well on this one.
'To avoid' .... are you getting the WING LEAK warning in hot weather? No, of course. The temperature sensing (logic) has been improved and limits redefined years ago. Not sure if only SW or also HW.
Next, the FCOM say 'may' keep the slats out. Not that you have to.
Depends where you are in the world, you will see whole fleets not doing it or absolutely doing it. One team manages without the warning, the other manages to get the refuelling done.