Homing issue - Cartesian with dual Y motors

[dc42]

Have you re-tested this using RRF 3.0RC1 on both the main board and the expansion boards? I think it is probably fixed.

There is one remaining known issue with endstops, which is that an endstop connected to the main board will not stop a motor connected to an expansion board unless a motor connected to the main board is moving too.

[dc42]

@too, please test again with release 3.0 stable.