This bug can happen on multiple devices, on seed 12345 empty buckets can make a bucketable animal disappear.
P.S. Some people have said this seed has herobrine in it but I’m not sure about it since I’ve been testing the seed
MCPE-242536
Seed 12345 - empty bucket
Resolved
Duplicate
0
Duplicate of MCPE-161447, this seed was also cited in the Last comment