USG20 passwd change prompt not accepting pass

JamesB

I regularly log in to my USG20-VPN web config using Chrome and lastpass plugin. I am on latest (or near latest) firmware.

On my recent web login (this is important, USG accepts my first login at the landing page), USG forced me to change password. I entered old password many ways (copy from lastpass to clipboard, manually type in, etc), however USG is not accepting it. I have increased complexity of new password also, no luck.

Curiously, my current/existing password is exactly 63 characters, the limit for the new password. Is there some bug here perhaps in this change page/prompt in accepting 63 char passwords? (existing). 

I would prefer not to have to reset my router for seemingly no reason on my part. I do not have SSH enabled, however could use console if possible (please advice is this prompt also present at terminal or do I simply need to manually force change via console to get around this?)

Thanks for any suggestions.

JamesB

Any insight here? This seems like a potential bug.

Blabababa

What firmware version are you using? Now the current release is v4.39.

BTW. There's a post related to password reset in business forum, you may try in this way and reset the password.
https://businessforum.zyxel.com/discussion/1558/how-to-backup-running-configuration-if-forgot-password
Most USG related discussions are in business forum but not here. Maybe you can leave your message there in the future