There's this one time I was fighting with the Ender Dragon in 1.14, she won't even go down to the portal after I blew up all of the End Crystals, I had to literally make a staircase just to reach her since she was flying in just circles, after like more than 100 times being launched away and lots of potions and gapples wasted, I managed to defeat her, with all of my armor almost broken, I don't know if anyone has experienced this but, this is the most weirdest bug I've ever seen, too bad I didn't record this. :(