Extreme caution still triggers when doing nothing

[X89K1]

This bug happened to me once during my first Gabriel clear back in 5.35. Unfortunately I don't have a clue on how to actually consistently replicate this issue, as ever since then I've never encountered it although the conditions were the same: doing nothing(not even moving the camera on Legacy) with weapon sheathed before the counter hits 2 seconds remaining, and then only moving, panning, or attacking when the debuff disappears from list.

EDIT: The job I was on when this incident happened was Black Mage at Level 80. This condition was the same for all non-encounters during Extreme Caution.