Declaration of Friendship doesn't expire

Declarations of Friendship are still bugged.

As can be seen in the attachment, the DoF expired 64 turns ago. A demand or declaration of war earns me the big red BACKSTABBED icon.

Are you playing at a speed other than Standard?

Yes, Marathon.

I don't play extended speeds, but understand that there is a UI bug on the countdown for expiration of DOFs, denunciations, etc. on extended speeds. Where a particular diplo action has a 50-turn duration on Standard, it has a 150 turn duration on Marathon. Unfortunately, the Marathon diplo screen only show 50 turns, so the diplo action doesn't expire until the counter gets to -100 turns.

Really?

You would think that computers would be good at counting and so on.

Huh.