Mobs Frozen and unable to pick up their items

So, essentially I was playing on my Hardcore World, and I had been attacked by a bunch of mobs inside of the Jungle Plains biome, when all of a sudden my three wolves, a skeleton, burning skeleton, cows and zombies had frozen in the spot and unable to move. They were no longer hostile, and no longer had any animations. I killed one of the skeletons, who was burning after I had went to sleep and the burning particles were still there and I was unable to actually collect the bones and arrows, that they had dropped. This also included the four cows, as they are currently stuck in the final frame of the death animation. (They're red and tipped over). 

Aside from this, the Skeleton and the Zombie have also become invincible. Which is pretty spooky, however, it is a good thing that they can't actually do anything. No idea how this bug occurred, though it was on the latest version of Minecraft, 26.3. Don't know what will occur in the snapshot though, so it could be fixed already? 

(Also, I was able to pick up blocks, sleep and go to daytime and my internet was working fine. Alongside mobs were being normal outside of this... Jean Gray like time stop bubble, lol.