Focusrite Scarlett 2i4 and stuttering Playback

[hoshi79]

hello,
sometimes my playback stutters. i doesn`t depend on how much tracks i am using. i am using auria for live playback. there is only one stereo file in the session, no fx, nothing! then i need to restart the app, ´cause nothing works anymore. i have no idea what it is.

i am using an i-pad 3, scarlett 2i4, camera kit (original) and a d-link powered hub
greets from germany,
rené