I made a storage room with minecarts and the soun that started the problem was the one that makes a minecart when it´s moving but, the ones I used, were motionless. When that started, all the sounds in the game started to fail: some of them worked fine but others were soundless, so I use F3+T to repair that but sometimes it works and other it doesn´t.
All hostile mobs I wak keeping had a name tag attached to them. Some of the can pick up loot and others can´t
The redstone issue is that some farms that use redstone, like the clock in the mob farm, cease to work properly so, I have to remove some piece of it and put it back in order to the clock work properly again.
My simulation distance is 12 chunks and my render distance is 29 chunks.
I think you are wrong, ManosSef. I´ve been writing about one issue and only one. If it causes many things or bugs, I think it´s only one thing we are discussing