How to fix "Queue is not empty after probing"

Can someone help me, how to solve the error "Queue is not empty after probing"

I built a controller for a fiber laser using a floating head system. When the machine starts running everything is fine, but after a few minutes of running, then it stops, and shows "Queue is not empty after probing"

 
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Yes, I use G38.2 to find material for cutting.



M130 (activated motion.probe-in)
G38.2 Z-10 F800 (probe motion)
M131 (deactivated motion.probe-in)
M3 S1 (THCUD system floating contact)

(cutting code)

I use a core i3 processor, gigabyte motherboard, 8gb RAM

I assume you have checked latency as I have a older i7 3.5gb *gb ram and it is useless for linuxcnc because of massive latency spikes.

John

I'm setting up my tool height setter and am having a similar issue.  It is not happening every time, but I'd say around 50% of the time i run the command.  I am running 2.9.4, gmoccapy and on an intel N100 PC and have no other latency issues.
Full error line is: emc/task/emctask.cc 68: interp_error: Queue is not empty after probing.  The other odd thing is when I don't get the error, #5063 will have a good value in it, but #5070 never gets set to 1

Gcode for the probe sub:
o<tool_probe> sub
O100 if [#<_task> EQ 0]
O100     return
O100 endif
G17 G20 G49 G90
G0 G53 X35.52 Y13.415
G0 G53 Z-7.0
G91
G38.3 Z-4 F10
(DEBUG, Z#5063)
G90 G53 Z-4.0
o<tool_probe> endsub