Hi Ziggy
They have to fix it.
Strata Schemes Management Act 2015
106 Duty of owners corporation to maintain and repair property
(1) An owners corporation for a strata scheme must properly maintain and keep in a state of good and serviceable repair the common property and any personal property vested in the owners corporation.
The only way they don;’t is if they resolve to by special resolution and it can’t effect the safety of the property. A leak would effect the common property.