Everytime i go to do manual focusing, after about 5 seconds, the LCD screen automatically dims and I am unable focus without re-touching the LCD screen. Canon has only suggested to change LCD brightness and change settings to LCD / camera turn off functions. however, i have the LCD down to turn off after 30 minutes and automatic camera power off function is disabled. Canon had no further suggestions. Has anyone had this issue or any work around. This problem occurs i all settings, auto, full manual, portrait, night mode which i tested. Im using a 32GB 4andisk SD card with magic lantern on it$