Nema 34 steppers with DQ860MA on Ramps 1.4 DIR pin issue

hello everyone,

i have recently put together a printer with a build volume of 520mx520mx520mm using Nema 34 motors driving ball screws for all axis and Dual Micron 3DP head.
I used a Ramps 1.4 set up to run 4 Wantai DQ860MA drivers. (one for X axis, two for Y axis and one for Z)

I started a print of a 10mm cube for calibration. everything was working fine except for poor bed adhesion.
i stopped the print and applied a thinned ABS layer to the glass bed for adhesion. When i started the same print again my X axis would only move in one direction.
I checked the pin connections for loose wires and used the lcd screen to test the X axis again and ended up with the DIR pin working intermittently until it now completely fails.

I have swapped out the driver twice now and the same thing eventually happened again. I only have this issue with the X axis.

I do see on the Wantai motor website a diagram that shows resistors between the negative signal pins, but with the Ramps board the signal is controlled on the + side.

any input would be greatly appreciated.

thank you

EDIT: I have Nema 34 motors not 42s...
EDIT: Attached - my wiring setup for the DQ860MA driver to the Ramps 1.4, power supply and motors