I don't know the details of this case in question, however you will probably find it is similar to the one I mentioned on an International flight.
The one I was involved in, there was no major problem just the slide bottle on one door was a little under the minimum pressure.
It could not be rectified quickly, so in order to operate the flights on time and as there was not a high passenger load on the flights, the Company elected to go under the MEL with seats roped off.