XR500 Media server file limit?

Hi,

i was wondering if anybody knows what the limit is for the media server as i am running in to some issue's.

up till about 5300 files all works well, but if i then add another 60 suddenly a lot of file's will dissapear from the media server.

accessing the DLNA server through a smart tv and a phone and both become unable to browse all the media only seeing a couple files per folder (interestingly if a playlist was made containing files that are now no longer visible, they will just play...)