For those who used setup_sshfs_alias to allow one-step sshfs mounting of graham onto the CBS server, there is a new fix to make the mounting more reliable.
Option 1. Re-run setup_sshfs_alias. It was updated today (2021/09/21) to include the fix.
Option 2. Edit your ~/.bashrc file to replace gra-dtn1 with graham in the entry starting alias graham='sshfs -o...