chat box gone stealth ?

Hi ,first of all i would like to thank you for your continuous development in the game , you people are always bringing something new to the table . Im the kind of player that i would like to communicate with my team through chat and the pings(love the new cool down pings by the way) , Recently i have been facing a bug that my chat box wont appear in my games and i would sometimes have to ALT+TAB and press league again to be able to use any of my abilities.What is bugging me is that this is only happening on my account only , my brother and i share the same laptop but he is not facing any of the problems that i mentioned before .So i tried everything that came to my mind , i tried to check my settings but everything seemed normal to me , then i tried to reboot the client but i didnt work , just as a reminder this is only happening on y account only i had friends come by and open their accounts through my laptop and they didnt face this problem . i would really appreciate any help that you can offer to me and i do apologize if my English is bad its is my second language thanks again.