Pinging "single player" world and fantom mobs

Hello! During these 3 months in the single-player game I observed phantom mobs, which I could not hit and as if ping. I was rolling back, teleporting, twitching. Crafts are not credited for example I kraft sticks and they do not appear in the window of the outcome of the kraft. And this applies to all versions, at least from 1.7.10 to 1.16.5 exactly. I also noticed that the items did not pick up .I have a bad internet and even if I turn it off will be the same thing