LowRider v3 Z axis drop / falls

Ive recorded a step by step Video how to reproduce the error (please view it in HD quality on YouTube itself)

1.) Start & Home all axis: success
M119 works

2.) Start recommended Squareness Test
(1:22 -4:20, you can skip this test)

3.) Home again: error on left side
M119 does not work!
(Minute 4:47 in the video)

It shows the red end stop light on the SKR 1.2 board like it should!

But the software itself doesn’t recognise the triggered Endstop via M119!

Sometimes if I restart it works again.
But sometimes it doesn’t and I have to restart again.

How is it possible that the board shows a red light but the endstop via M119 isn’t triggered???

Any suggestions?

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