Been fighting a Crown Wave that has in intermittent slow travel issue. No fault codes are set in active or historic faults when this occurs.
Both speed and operator presence override switches are in fast / safe mode when this occurs, but travel speed is reduced to a creep at same speed as when operator presence switch is in bypass mode.
Problem seems to clear when keyswitch is cycled.

Problem has been very intermittent and hard to duplicate. I have only been able to make it occur twice. Once when I deliberately hit a bump hard enough to shake the truck, and once for no apparent reason. I suspect a loose connection somewhere, but have been unable to locate anything thus far.