When reading through the Bible, App version 5 would remember where I was the next time I launched the app. Since version 6, the app doesn't remember - I'll close my tablet or the app at Luke 22, but the next time I open the app it will resume in Luke 21. The gap between where I was and where it opens can be one or two chapters behind and other times it is many chapters behind where I left off.
The same thing happens when I have a couple tabs populated (a Bible, study Bible notes and a commentary). Whether they are linked or not, if I swipe from the Bible to view one of the other books, and then swipe back to the Bible, the Bible usually isn't where I left it.
Linking books together gets very messy because the app usually forgets where it was in one or more of the books, so I don't link books (though I really would like to).
This happens with both the Logos Bible and Faithlife Ebooks Apps.
My wife has her own tablet, the same model tablet I have (Samsung Galaxy Tab A; SM-T580), and she has the same problem. I read from NASB on my tablet and she reads from NKJV with MacArthur Study Bible in the lower part of a split screen on hers.