Layout randomly disappearing

Hi,

I have flagged this issue before but it is now becoming increasingly more urgent.

I have completed development of a project, published and delivered to client, client reported problems with some screens.

Turns out that some of the screens had "lost" their layouts therefore the background disappears and text box fonts were reset.

I went through, reapplied the layouts to the affected slides, republished, checked again and this time it was a couple of other slides that had lost their layouts.

It takes a couple of hours to complete a cycle of fix, check, publish, check and I am still getting this problem.

This has happened on all my projects, however this latest one seems to be constant.

My story size is just over 220MB, using s/l 360, 12GB RAM, plenty of spare HDD.

When I look at the storyline flowchart of slides, the layout appears to be there, but when I click on the slide, the layout is not there, so I cannot even just do a quick visual check of the storyline slide flowchart, I must open every slide.

I have attached an image of what I am up against.  

Is this a fault or has someone else overcome this issue?