Twitch Drops - Not working

Did you try another participating channel, just to be sure? As you do not need to have the accounts linked for the progression to work, only to claim the rewards (so you do not need to fiddle with that), I would focus on the Twitch itself. If another channel won't work too, try to hard reload the stream page (Ctrl+F5), maybe that will help (I had a similar problem in the past and a hard reload resolved it).

Twitch has been flaky with drop progression for me this past week, not just with Battlefield streams.  Try logging out of Twitch entirely and clearing your browser cookies for anything "twitch" related, and clear temp files and then login and try again at a participating channel.

Good luck!

Just wanted to drop in to say that it may be a Twitch issue or possibly a problem with the stream. I had a supported stream running in the background after reading this post, and it does seem to be tracking progress (I don't usually bother with Twitch drops, so there wasn't any progress previously). 

Thanks for the response. Sadly the issue persists.

Have you tried from the mobile app or with another browser? The drops from the other campaigns are also locked?

Try a different browser, heck even try on mobile if possible.  Try keeping the stream in the foreground tab, not in the background.  These are all things I tried this week when drops were being finnicky.  Eventually I got everything.

That's a pain. It might be worth seeing if Twitch support can help if the other suggestions here don't change anything.