crash when changing L in BG color selector
when i change the L level in the color adjuster for the background color, the program freezes and won't recover. after testing 6 times i managed to crash the system 5 out of 6 times. i'm running on an i5 6200U with 8 gb ram and an AMD R7 360M. this issue doesn't happen on my main workstation which has an i7 9700X with 64 gb ram and a Nvidia Quadro P4000.