Mobs Disappearing

In the release 1.2.20.2 there are a few bugs. one of them is mobs just randomly disappearing and reappearing. I walk up to a skeleton to kill it and it just disappears but its still there so it shoots me and then after 2 seconds it reappears. its weird. Please do look into the bug. i also hope the bonemeal not working bug has also been addressed. Thanks for reading! Have a great day