Ok, I found the problem.
Somewhere along the line a few parameters got scrambled.
143 - DRAW BAR Z VEL CLMP: should be 250000, was 537120912.
222 - ROTARY AXIS INCRMNT: should be 0, was 134217728.
223 - AIR TC DOOR DELAY: should be 0, was 4096.
306 - POCKET UP/DN DELAY: should be 0, was 134217728.
222 & 223 are for Horizontal mills.
Have no idea how it happened but it did.