Been using Gwisin after the rework in PvE. Noticed that when leaving Invis it often does not apply the Weaken debuff when it damages enemies with the Smoke cloud. It does still disorient enemies fortunately. The lack of Weaken can be seen with the lack of yellow numbers and stuff like Echo of Harvest not triggering on defeating afflicted enemies. Smoke clouds in general start behaving strangely when you start outputting more of them with Snare Bomb and On the Prowl giving sources of them as well. May only be visual though.