Keyboard shortcuts not working when launched from LR

[Tommaso.dido]

Hi there!
After the last updates (Adobe CC), I have a wierd problem: if I start Photoshop normally, everything works smooth. But if I run it as an external editor from Lightroom, no keyboard shortcut is working anymore.

I have to close PS, and re-open it as from the program menu.

How can I solve it?

Am I the only one?
TIA
tom