MC motors starts when arming VTOL in FW mode

Tried other VTOL frames to see if this problem was airframe dependent, but nothing changed.

This is creating serious trouble if you need to flight test the Vtol in FW mode before trying a transition, and that’s mandatory with big planes. Can someone please verify this and/or bring it to the attention of a developer? It should be an easy fix, given that is very easy to reproduce even at the bench.
Thanks!