I've been encountering an issue with my singleplayer worlds. Namely, I've been experiencing lag as if it were a multiplayer server, on my singleplayer worlds.
This presents itself as chests not opening instantly, mob movement compensation (mob stops chasing me and seconds later it charges with greater speed) and recently I lost a lot of resources due to my elytra not opening above a lava lake in the nether, (the elytra activates far later than the keypress is performed) and other such issues.
These seem like typical bad server performance or internet connection issues, but my world is singleplayer and not opened to LAN.
Is there an explanation for this? Is this normal? People I've talked to have never faced these issues. And is there anything I could do to fix this?