After transfer to DOG all campaigns are unlocked. If player picks for example "Elements at war: protectorate" and select wrath battle group a message is prompted that says You have to pick protectorate BG..... after message all recently unlocked campaigns are locked.
I have the same problem except the campaigns are just locked right from log-in. No message or anything. It started last night after the daily reset, when I relogged about 30min later it was fixed, now its locked again. Edit: Quit, waited 10min and relogged and all my campaigns are available again.
I figured it out. For me, if I select a campaign and then hit the Campaign button to go back, it locks everything.