Wow ! I never had That happen to me.
I
bathe right after the first feeding of insects, 2 hours after "lights" on.
You can try the
bath at the end of the day, to relax baby and get him ready for sleep if this continues.
Just make sure water temp is 90-100*F, level of water to his shoulders, And most important, supervised. You can place your hand under his tummy for support, or place a rock, old clean sock, something that he can use to rise out of the water.
Also, he may at some time, duck his head under the water, which means he's having fun and playing.
Hope this helped,
Janie.