I believe I found a bug where:
In version 1.2118 lathe mode, in G7 (diameter) mode, in step jogging mode
Pressing any jog key, especially a Z-axis jog key, causes a move in X+ direction a random large distance. I was trying to jog Z- at the 0.01 step size and X moved about +0.650.
Jogging behavior seems fine in Radius mode
While I'm writing, a feature request: can lathe mode change the Z axis jogging keyboard keys to be the up and down arrow keys, like Y axis jogging in 3-axis mode?