Hi,

We apologies for delay with your ticket Zedri, but problem has beed resolved few days ago.

It resulted from suhosin extension installed on your server, and it's option suhosin.executor.include.max_traversal=2 (should be 3 at least better 5).
So if others had the same problem (empty grids anywhere in AP) try to change the option, it's likely to fix the problem.