Singleplayer server like problems.

I'm playing on a Lenovo tb3 850f

Something is causing me bad server connection like issues in a singleplayer world and the time I'm writing this I'm really upset because I just died because of it.

The problem is exactly as in servers....

I mine a block and I get that block several seconds afterwards,or this current case it just disappeared (sometimes back into my inventory but sometimes it's just completely gone which is really bad if I would be building with expensive blocks)and because of it when the block I mined reappeared I was knocked below that block into lava...also mining that block broke my pickaxe but the block appeared back so I basically broke my pickaxe while making no difference in the terrain.

Of course this happens whit picking up items,opening chests,using bows and if you are swimming and you want to go to take a breath,you can't even do that because even though you are above water,the game somehow still thinks you are under it so you won't stop drowning and you can sid that way too.

I was thinking that maybe 1.5 caused it because since it got released all of my actions are either delayed or denied and I died not once to this.