ssh-add -l Error connecting to agent: Connection refused

Question

I'm using Ubuntu 18 on Windows Bash

When i launch Ubuntu I can ssh-add without any problem.
Then I connect to a remote server ssh user@address
The ForwardAgent doesn't work (git pull, for example fails).
Then I disconnect from remote server CTRL+d
I try running ssh-add -l and I get Error connecting to agent: Connection refused

Everything used to work fine on Ubuntu 14 - I recently upgraded to Ubuntu 18 and now I'm stuck.

OpenSSH_7.6p1

Solution

This issue seems to be fixed in October 2018 update (version 1809) (GitHub issue).

However you may have not installed this update yet, because October update was postponed and will be released on November 13, 2018 (Microsoft support page).

UPDATE (2018/12/16): I've applied October Update and confirmed that this issue has been fixed.

Comments

[Haim]

I reverted to Ubuntu 16 with OpenSSH_7.2 and everything is working as intended

[pa4080]

I'm not satisfied of ssh-add at all, fortunately in most cases we can use `~/.ssh/config/ case instead. For example: How do I setup SSH key based authentication for GitHub by using ~/.ssh/config file?