OSX Mojave + Anker bluetooth slim keyboard key combos don't work

Anyone have problems with key combos working on an imac? I use OPT-CMD-C as well as other 3 and 4 key combos a lot and it doesn’t work with my left OPTION key but it works with my right OPTION key.

It might have something to do with the fact Command is the windows key in Windows but I’m not sure. Anyone else have this problem with key combos requiring more than 2 keys not working with the left side OPTION key?