Movies page freezing when scrolling

Hi Folks

Been using OSMC for a while and all has been well, running on a rpi2 latest updates installed. I now seem to have an issue. When I scroll down my movies I get a way down then the 1cons are missing (but the title is displaying) then a bit further and the page stops responding. After that nothing will work and I need to reset the Pi to get it going again. The movie list is not that log (179) and its been working fine with the same hardware for ages. Anyone else have this?

Thanks

Where are your movies stored?

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Movies are stored on a NAS drive. The RPi is connected to the network via a cat5 cable.

I can use kodi on a laptop and the movies scroll through OK. Like I say was just interested to see if anyone else was having this issue.