I can´t see some players and not everyone can see me

That´s my Problem, i can´t see some of the players but some of them can´t see me so all in all we cant see each other.
My question is, what could be the problem for this?

Solution attempt:
We´ve got an house script that allows us to buy more houses.
If we go inside and come out we can see each other sometimes but this is very anoying if we have to do this every single time

Sorry for my bad english xD

Are you in the same Routing Bucket as the others?

yes, i do