Anti Lag Death

Hi, I have a problem on a purpur server that I made to play with friends, which is my horrible and unstable internet that LOVES to shutdown for around 10 seconds outta nowhere an then come back at full speed like nothing happened. The result is that the world, on the players POV will just suddenly freeze and then move super fast to catch on or the player will be disconnected. These events, although funny and tolerable at first, became the leading cause of death in my server, paired with the loss of items. Are there any plugins that remedy this issue? If I dont find any, I will just turn on keep inventory, but I want to try something before it, at least