Minecraft players despair or become invisible?

I have a big problem in Minecraft. Namely, if a player or entity is too far away, I will not see it anymore or Despawn and spawn only when I'm around. It does not matter what version it is, and it annoys when I do not see other players because you are too far away, although I can see everything else and my visibility is wide. Why is that?

That is normal. The entity does not spawn properly, you just do not see it.
That is because there are different chunks

On each server, or only on certain?

I think your rendering distance is higher than the entity render distance set by the server. (Distance is a distance, as far as you can see.) In English, is your block vision distance (ie how far away a block can be that it still appears to you) higher than the distance Server discontinued player vision removal, then you do not see players, but the world already.)

Many servers that are slightly inferior have simply scaled down the entity render distance to save performance. This can easily be changed to "entity-tracing-range" under spigot.yml.

Unfortunately you can't change that. The server simply does not send you the data where the other player is if you are not in the radius. That's why he will not show you then.

Check out if the problem is on other servers as well.