This has been a longstanding bug on iOS that I've reported before but as it is still present in the most recent Beta I'll mention it again. I use DA Carson's For the Love of God devotional as I do my daily Bible reading in MCheyne. To launch For the Love of God from the Devotional list takes 3 tries before it ultimately loads.
The first time I tap on the icon it just takes me to my most recently read book
then I go back home and it launches the book but opens to a page that is blank
then I go back home and do it again and it finally launches.
This is a pretty significant bug that frustrates my daily use of the app.