I use Layouts extensively with the iOS/iPadOS app. I have a Devotions layout, two different layouts for sermon preparation, a layout for having a couple bibles open when I am preaching.
The annoyance I find is that when I switched from my Devotions layout to the sermon layout, if I do not update the Devotions layout first, the next time I open it the place I am at in the Bible and other book(s) I have open is not where I want to be reading. So I have to find the starting place for the day's reading, etc.
This is even more disastrous when I leave my sermon layouts. I have 36 resources open in one of those layouts!
It would be nice if when you switch from one layout to the next, that it would automatically update the layout, instead of having to open the layout screen, slide to the left on the layout name, and tap "Update".