End Dragon Bug

So I found the stronghold activated the portal and entered. I have quite a lot of my free time in this world and really grown attached. Anyways midway in the fight I got thrown into the air and died. Upon re entering the end as I had a bed next to the portal I noticed the Dragon was gone and the portal filled I was so confused. I left the end and sailed back home to discover my home was gone. The Ender Dragon was at world spawn and destroyed everything I had built and all the mountains. All the hours on the world gone because of a bug.

This should be your top priority to fix as it made me rage quit Minecraft for the first time and I’ve been playing for well over 7 years and a lot of other people who have experienced this as well probably