As the title suggests, I had been struggling lately with getting keyboard shortcut customizations to stick.
Most changes were to just the modifier flags. To achieve one I need a character change between [ and { which is… in effect a modifier change?
Mysteriously and apparently at random, my settings would be lost. I wasn’t sure how to make a useful ticket out of this. Those are all the details I have on the issue 
I haven’t had any issues since returning to system level shortcuts. Has anyone else seen this behavior?