I have the 4th gen iPad and never have had any latency at all, I do use the Line 6 sonic port with the lightning connection never had any clicking either, I have had the switch from bias to jamup xt work then go back to bias it work the back to jamup xt and no sound thing... very aggravating!!! then sometimes when I boot the iPad and didn't have the sonic port in yet and even with it start out with no sound and had to kill program and sometimes still had to reboot the iPad.

over all it sounds good when working, I never have had to change the to the low latency setting as well. maybe it needs a faster cpu or its the interface?!?!?

maybe this would work and you could use the FCB1010