Hi Umberto!
I have always admired your dauntless tenacity and your exemplary dedication toward resolving issues for your customers. I did not really expect you to take your weekend to handle this issue, however, I, for one, am truly grateful.
In regards to your initial observation, the pushback works perfectly if the "de-icing" option is declined. If it were the nodes issue, would it also not show up during normal pushback?
I did find that if I "restart" GXS instead of just "resetting" it, the vehicles still remain in position visually and the option to pushback is then present when I press CTL-F12. By selecting "NO" to the anti-ice this second time through, the normal pushback sequence can then be selected. It is an acceptable workaround that doesn't seem to disturb the visual immersion, if no other remedy can be found. BTW, I do like the new option to push straight back. This has been needed.
Thank your great work with this program. As I mentioned earlier, it has become an indispensable addition to all my flights.
Cheers!