I thought all cats don’t like drinking water close to their food bowl? Its some instinct that food near water could indicate tainted water. Try moving their water bowl to another area
Varies by cat. I've had a couple that didn't want water near their food and a couple that didn't give two shits where their water bowl was as long as it was clean.
Oh interesting. Yeah I've got one cat who will just turn around after eating kibbles and just stay drinking, whereas the other one will run to the bathroom and meow for us to turn on the tap a little
Cats are extremely sensitive to smells and make lots of decisions based on how things smell.
The funny thing is, they're wildly inconsistent about what smells are fit to have near food, what smells are inedible and what smells are offensive enough to try and fix.