Joint jog requested for undefined joint number=-1 (min=0,max=1)

Hello,
I can't find similar error message anywhere on the forum
two different machines with two different PCs
linuxcnc 2.8.2 axis interface
execute any move from MDI command eg G1 X1000 F10
change tab to manual control (F3) press any arrow on the keyboard and the whole axis interface freezes but the machine still moves
after 20 second sometimes even a minute it un-freezes and shows a message Joint jog requested for undefined joint number=-1 (min=0,max=1)
dmesg shows nothing
doesn't matter if it's homed or not
thanks

I don't know
I cannot see it in the configs
 

Indeed I managed to freeze Axis UI for a while. I reproduced this fault, as described above:

• In MDI execute G1 X-155 F10
• While X is moving switch to manual mode (F3)
• Press an arrow key or PgUp PgDn

The UI freezes, after a while the errormessage apears. Behaving as described before.

As this workflow makes no sense, stop or abort the movement first, then switch to manual mode and jog with arrow keys.

Candidate fix in branch dgarr/2.8_forum_bug:

github.com/LinuxCNC/linuxcnc/commits/dgarr/2.8_forum_bug
github.com/LinuxCNC/linuxcnc/commit/85c9927e9365d0d

needs testing by users

 

regarding this comment "As this workflow makes no sense, stop or abort the movement first, then switch to manual mode and jog with arrow keys"
because when I stop/abort movement mid cut in a lathe it sometimes chips the insert which is super annoying
that's why I tried pausing and the switching to manual mode but found this issue
Can you "cheat" somehow linuxcnc 2.8.2 to stop the program/abort movement without stopping the spindle so I can pull out in X? I'm not talking about "jog while paused"