IC pro unresponsive

hey there,
im not getting anywhere with ic pro. i have the newest ipad and cubase 8.5 as my DAW. connection goes fine and i can move the faders and also use transport. but the whole thing is super sluggish - the postition marker moves with a bad “framerate” so to say and it seems i have lots of latency. at some point ic pro looses connection all together (no saying so) and becomes entirely unresponsive. i dont know what to do.
my wireless router only does 300Mb/s - could this be the issue? or any other ideas?

thanks a lot