New development:
This is only showing on the X axis that is the only one with the endstop configuration set to max (#define X_HOME_DIR 1)
I changed it to min and inverted the X_DIR and the bump feature worked.
Now, my machines all have the X endstop on the max side, and it was working fine in previous versions of marlin ("1.1.0-RC3")
Any ideas?
Thanks!