Any way to update to beta if purchased from the Apple Store? Also, do you have any betas that are compatible with 10.13 Developer Preview 3?

I am having the same issue. In fact, it also happened for me with Cookie 4 and it's why I upgraded to Cookie 5 (hoping the issues had been resolved). It's definitely has something to do with how iCloud syncs the browsing history. Honestly, it makes me regret upgrading to Cooke 5.0... Why spend the money on the upgrade to get the same functionality?