Garry's Mod Crashes When Changing Spawnlists

Sometimes, when I’m playing GMod, I try to change spawnlist to anything and it just crashes.
It’s REALLY annoying because I play GMod in fullscreen and when it crashes in fullscreen, sometimes I have to reset my computer.
Anyone know how to fix this?

same thing happens to me. In fact, it will even crash when i spawn an object! i hope someone helps!