Make the Ender Dragon abandon its perch attempt if a geyser prevents it

It turns out geysers are very useful for preventing the Ender Dragon from reaching and destroying player made structures near the end spawning platform or end gateways by pushing it up when it gets close.
However, an unintended consequence is that if a geyser is built next to the central fountain, the Dragon will be endlessly stuck attempting to perch while being pushed up by the geyser.
Instead of fixing this behaviour by negating all interactions between the Dragon and geysers, I kindly ask Mojang to simply give the "perch attempt" phase of the Dragon AI a cooldown after which the perch attempt is abandoned and normal behaviour resumes.