Faders lag behind audio when using S3 with AVID DOCK and IPAD.

[rmoondoggy]

When I use my S3 and DOCK together ....the S3 loses fader-connection, or fader movement lags 3 to 6 seconds behind the sound. ie: Move fader from -40 to +6 and the sound takes about 6 seconds to respond. Fader moves on the screen, fader moves simultaneously on the dock.....but the sound takes a long time to respond.This problem came out of nowhere.....Everything was working fine then suddenly this started happening..... The S3 works perfectly alone, the DOCK with IPAD works perfectly alone......Anyone have this problem?
Here is what I have tried:
1.verified Drives(internal and external)
2.updated firmware on everything.
3.reinstalled EUCON,
4.reinstalled protools 12.5.1along with HD driver...no improvement.
5.updated to protools 12.6 and HD driver.
I have not added any new hardware or software or APPLE updates before this started.

My system:
ProTools 12.6
OSX 10.11.6
MacPro 2013 Quad processor 32 Gigs ram. 1TB drive.
HDX in external Chasis.
S3
Dock
IPAD 2
OWC external drive
MOTU MIDI interface.