Same topic linked here: Random invis damage in mushroom forist
In the Mushroom Forest, something happened while I was fighting Shrooms (the level 3 guys)— I left/finished a fight but continued to take damage. I kept taking hits of 15 or 30, so it’s got something to do with Shrooms hitting the player when the player isn’t there. The only way to end the constant damage is to leave the Mushroom Forest.
The white error messages are the damage notifications, I think.