If you get transport not connected, it would mean you have something starting/killing it.
It's easy to reproduce the issue:
felix@gemini:~$ rclone mount gcrypt: /home/felix/test --daemon
felix@gemini:~$ cd test
felix@gemini:~/test$ ls
mounted Movies TV
felix@gemini:~/test$ ps -ef | grep rclone | grep test
felix 1507486 1 1 17:22 ? 00:00:00 rclone mount gcrypt: /home/felix/test --daemon
felix@gemini:~/test$ kill -9 1507486
felix@gemini:~/test$ ls
ls: cannot open directory '.': Transport endpoint is not connected
felix@gemini:~/test$ cd ..
felix@gemini:~$ ps -ef | grep rclone | grep test
felix@gemini:~$ cd test
-bash: cd: test: Transport endpoint is not connected
felix@gemini:~$
felix@gemini:~$
felix@gemini:~$ fusermount -uz /home/felix/test
felix@gemini:~$ cd test
felix@gemini:~/test$ ls
felix@gemini:~/test$ cd
felix@gemini:~$
Sortet it out somehow. Though I never have had this problem before. Been messing a lot with Wireguard lately. Think that i messed up my connections. Went back to OpenVPN and now all is good