Peppito does the same in the bath tub, you have to wait that he finishes drinking to be able to use it But he also drinks from a bowl or his fountain, no problem. Using running water in the bath looks more like a game, or a ritual for him. When we go to my parents, he does the same! He jumps into the bath and ask for water. During this time we have to tell him he is a good boy and encourage him, otherwise he stops drinking and it takes a while before he goes out