[2020] ingame bug probably just on mac users!

well, earlier i was playing tft 1v0 and my screen bugged, half of it showed the esc menu and the bottom half showed part of the mode screen but very barely visible,I thought it was nothing, a bug in the way itself, but then I tried to test the new sett skin with a friend (who uses windows) and the same bug happened when the game started. I fixed the client twice(with the complete repair) and tried the training / custom mode again and the bug was repeated, I use a macbook pro 2010, and the first time this bug happens to me, the live server was normal and there was no bug