Qt Creator cannot recognize the 'i' keysym when started in tr_TR.UTF-8

Qt Creator does not recognize the 'i's in my keyboard and prints out garbage chars when pressed. My default locale is tr_TR.UTF-8. I've started it in console with default settings and there is a huge stack of warnings about keysyms. When started with LC_ALL=C it works perfectly. I've uploaded a screenshot of the bug and the console output of QtCreator at startup.

PS: In Turkish the 'i' letter works differently. We have 2 'i's. The first one is 'ı' and its uppercase version is 'I' , which is the uppercase of 'i' in English. Similarly we have 'i' and 'İ' for uppercase of it. The keyboard's Shift Key changes i->İ and ı->I.