Draconis Mons: Ignis Sulfur Water on Platform
I went ahead and tested after the battle and I was able to replicate the issue. It’s not 100% but the platform I’m on the picture seems to have the persisting Sulfur Water debuff issue when transitioning from the water to this platform very often although I was able to get to trigger on a few other platforms occasionally.
If you get this bug, as a workaround, jumping in place fixes the issue and the debuff will stop ticking like its supposed to.