I am doing something like $current_array=array(); $current_array=$server2; where $server2 is array too containing some information, from time to time depends on array INFORMATION IN ARRAY BECOMES BLANK, rows in array are still present but every value is BLANK. Did you ever had issues like that ?
It will happen if $server2 doesn't have any data in it. The best thing to do is debug what the values are before and after this. There's no reported bug about this as far as I'm aware and I've never seen it myself either to be honest