sandboxie inside virtualbox windows 10 host

Hallo,

I want to use bidirectional clipboard in virtualbox.
I have windows 10 host and windows 10 guest.
Bidirectional clipoard (copy / paste) works perfect.
Now I have installed sandboxie inside the windows 10 guest.
Wenn I start a programm in sandboxie only the bidirectional past is working.
Copy does not work from guest to host. Copy and past inside the guest is working (also from sandboxie to outside the guest)

Can someone help?

Many thanks