journalctl as root.

Something has happened atleast, maybe.
Today i did use diptoh whole day without issues.

The gpio-expander is tricky, as it looses its config if it looses power.

I had to add some paper (2 layers of 80g) under the pcb (between 3dprint and pcb) for reliable contact. (<< dirkvl FYI)

If fails, just lift the toh few mm from the bottom left corner, to make the microswitch toggle.