Então parece que o encaminhamento ssh é o problema?
Tmux captures the environment at initiation. If you are on your desktop with
SSH_AUTH_SOCKpointing to A, then you disconnect (C-a,d). Now you SSH to your desktop, theSSH_AUTH_SOCKin this environment will be some value B, you reattach, and you haveSSH_AUTH_SOCKstill pointing to A.