Every time I try to use the commands under 'talk' with Dogmeat, be it fetch, dismiss or tricks, the commands are all completely blacked out. Is there any way to solve this issue?

I have seen times where it's like that but I can still select them. Have you tried selecting anyways? I think it's similar to the different color dialogue options in the past where the no longer lit up ones means you've heard what you can using that option.

I have, sometimes it works, sometimes it doesn't. It's not a huge deal because he's fairly self sufficient but pretty annoying when I'm in a room full of stuff and is says he can't find anything.