Rhodiola Rosea - Cotton Mouth?

I started taking Rhodiola rosea and MAG-10 yesterday, and today I experienced some cotton mouth during my session at the gym.

I always drink plenty water - 2.5-3L at least.

I know it’s not the MAG-10 as I have done a cycle on it before and not had this problem. Is this a related side effect from the Rhodiola rosea?