Same problem. Sent ticket. Here's the reply.... "Thank you for contacting us. I've read your message regarding the flashing visual of the Claim Valuables button when you log into the game. To clarify, this is definitely normal regardless if players have any or no rewards available to be claimed. My apologies for any…
I've tried talking to everyone. It does not show up in my journal as a quest either. I'll give it another shot I guess. Maybe I'm not talking to the right person.