I own a 2023 Lexus ES350 and I am finding the floor board in the right back passenger side soak and wet after using my air-conditioning. I tested the leaking sun-roof theory and that was not it. I also left the car sitting in a very hard rain-storm and that was not it, It seems to be directly related to the air-conditioning.
The issue with this is that if it is coolant, that solution is very dangerous when inhaled. I wonder why this seems to be an issue with these vehicles.