Typical result of one of the fill valves at back of machine not closing properly (usually require replacing)
Can happen due to age of machine, failed part or in my area sand/grit from borehole supplys getting caught preventing valve from closing completely
This allows water to trickle through slowly so filling the machine again I suggest you turn off the water supply while not using it
If you have 2 seperate inlet valves you can try turning one off at a time and leaving it for a while to find out which is leaking.
Leccy
May 2008