Mailbox choices disappear often, even after reinstall; sort problematic – Gmail - Email by Google Review

I’ve used this app for quite a while. Recently about a third of the time I open the app on my iPad, the bar on the left side where you can choose to open just one inbox or all of them is not there. That includes the three lines at the top, so there’s no way to change it - I have to close the app, and reopen it. This is a pain. Also I use sort for one email address, and it often puts news articles into the Promotions section rather than Primary - even though some from the same source are going into Primary, as they should. Please fix these issues!
Review by Solarbear16 on Gmail - Email by Google.