DJay Pro Windows 10 audio briefly pauzes during playback

I’m having an issue with DJay Pro running on my Surface Pro 4.
iTunes library is installed on a Samsung 256 gb microSD card.
During playback a song somtimes briefly pauzes for 0,5 second and then continues.
I’ve analyzed songs in playlists but during automix this happens sometimes and not with all songs.
Switching to airplane mode with no wifi and bt doesn’t solve it as well as having DJay Pro running as only app.
Has anyone experienced same because I can’t seem to get rid of it and it is random which is pretty annoying.