Terrible glitch.

Hello Mojang and JIRA,

I am reporting a bug/glitch that is preventing me from enjoying the game, making me (and many others) nervous to go exploring, go to the nether/end and leave the game,

The bug is that sometimes when I unload the chunks at my house, or indeed anywhere, sometimes blocks I placed/mined, will get deleted.

This Is a horrible bug, so please fix it as soon as possible.

Yours sincerely,
BeansRat89