Wi-Fi signal drops when a part of tablet gets covered with hand

When holding my tablet in landscape mode and when holding it with two hands, maybe where my left hand naturally sits it covers Wi-Fi antenna band and it just lowers the signal or it comoletely drops if signal is already low.. BTW do you even consider it as problem or if you know what solution is for this please tell me.. Any advice is welcome.. I consider opening tablet and trying to make a new antenna band around whole tablet so signal should be better.. Idk why they don't do it in factory.. Cheers!