I found something in a minecraft world of mine where out of no where every single animal and pet that i bred or tamed even villagers disappeared and never came back

I was flying back to my base from my farms to trade with my villagers for some emeralds and i realized they were gone so out of curiosity i go to my house and horse stable to see if my cats dog bird and horses are there and they arent so i go ahead and check everywhere else with animals and they are all gone