Certain redstone is getting deleted when ever I leave the chunk that it is in.

Put the summary of the bug you're having here

Whenever I create a red stone machine, such as a simple timer, that it would stay in tact, and still working.

Every time I leave the area that the redstone is in, I come back with all of the red stone deleted. I then have to replace it all. I have had this happen multiple times to my tree farm, automatic brewing station, and automatic pumpkin pie farm. I have now gotten so frustrated that I am done playing Minecraft until this glitch is fixed.

1.) Build a simple redstone creation, such as a comparator timer.
2.) Walk away from it to another chunk while the red stone creation is still on.
3.) Return to see the bug.