Thank you. Tentacles move in circle around an eye. In fact collision areas of octopus and mage cover whole sprites so collision appears "on contact". I think decreasing size of areas would solve issue collision would appear then "on overlap" alternatively animation of catching player character could make a trick.
Eye are not on the grid because due to some default settings layers of dark cloud and monsters are offset by half a grid in relation to player grid. When I noticed I already had levels ready so I had to roll with it 😅.