Hello Wonder828! 👋
I'm sorry for the delay in responding. I can confirm that I can reproduce the tag issue here on my end as well. If you select something that isn't a tag (such as a Category or a specific vault) then 1Password 8 should remember your selection the next time that you open the app. The issue seems limited to tag selection. I've added your report of the issue to an internal work item that is already open for our developers to investigate.
Next, double click on a PW item ... and instead of racing off to that login site it still opens a meaningless submenu. Hunt and peak for the highlight to open and fill.
At the moment, double-clicking on an item to Open & Fill isn't available in 1Password 8. That being said, we do have an open work item to investigate adding the feature and I've added your comments there so that our developers are aware that this is something that you'd like to see.
Thank you for your feedback! 😊
ref: dev/core/core#15327
ref: dev/core/core#10046