Extreme caution still triggers when doing nothing

[CKNovel]

It will still trigger if you auto attack the target, "lifting your hands off your keyboard" is not enough. You need to either sheathe your weapon or unselect your current target.

Forgot to mention it, the video shows it but the weapon is sheathed.
It often triggered when i sheathed the weapon away a bit early (more than 3 seconds before the debuff disappear.), not sure if it's related.

I haven't done the duel, but this mechanic has been around since the final tier of Heavensward and what I always did was detarget and move my hands away from my keyboard when the countdown was almost up and this still works in all the content I do.

Yes, as far as I know it's been in Baelsar's wall, Lamebrix, Susano, Neo Exdeath and other content before Bozja. I never had troubles with those.
The bug only happened in Zadnor and the Southest front, I'm suspecting the mechanic struggles when there's a lot of player. Never had problems in any other content, including Dalriada.