Have a good one for you guys.

Have a good one for you guys.
Yesterday I’m running an auto level probe job on the R7. The TinyG and R7 have been paired and working non stop for over a year.
Nothing modified, changed, moved, etc.
about half way through the job the second Y starts moving at max possible velocity every move.
Kind of funny to watch. It would move to a new position and would rack the crap out of the build, then the other leg would catch up.
Thought it an odd fluke.
Shut down everything throw the plate away, jog. Same thing. Checked the wires, which would give a stutter not a super speed, nothing.

Still don’t know Wth?

Any thoughts? Basically one Y now moves at a search of what must be 10k mm/m while the other moves at 800.
Both Ys mapped to axis one, no changes made to settings.