Hashlink is up to date it says right on the dash the wallet is updated, this is bogus. There is no reason that best pool would be the longest chain they are a small percentage of the nethash. This fork is fucked.
There's clearly someone else mining at the same chain as best-pool. Probably some big multipool. Look at difficulties at hashlink and best-pool. Hashlink is mining on a shorter chain with lower difficulty - they are mining on this fork all alone.