Why all daisy chained gfci circuits in house randomly trip? Stand alone gfci no problem
When I see "random tripping" I think "nuisance tripping". The easiest way to fix this is to remove the daisy chain receptacles off of the feed through GFCI and replace each one with a individual GFCI receptacle. Don't forget you still have a problem but now you can isolate it to one particular point and that will help you in your troubleshooting. 

Some may comment that it's expensive but a contractor always measures time over material and whether replacing the receptacles will cost more than the hours you will be charged trying to find a "random" trip.

Hope this helps good luck.