Default Loosing WiFi signal when covered

Hey guys, I am going just to ask you, If somebody noticed the problem with losing wifi signal, when the phone is covered on sides by hands, after updating to 4.4.2.. When I flip the phone to landscape mode and cover him as I play the game or watching video, then the phone starts to rapidly lose signal.. Then when I flip to to portrait with no covering the signal is excelent..
Dont know if its update problem or could it be wifi modul issue?.. Does anybody have same problem or similar issue?
Thanks for any suggestions..