Lightroom Classic: Book module many problems

Currently using LR version 8.0 build 1193777

I have spent hours designing a book in the book module. Now I am finding many bugs in the program. Some examples:

I saved the book, intending to come back to it later for further work. The saved book is essentially not editable.
* Try to change a page layout, such as from two photos to three -- the change at first shows but then does not stick; it reverts to the old version.
* I decided to change the layout from 10x8 to 13x11. This cannot be done. After as dialog warning of possible unexpected changes -- the thumbnails do not change. Go off to another collection and return to the saved book -- all the page settings show the old size, etc.
* After saving the book, there is no longer a "Create Saved Book" button to save changes. I can find no way to get the "save" button back.

Searching online I find many complaints of similar problems. Nothing works to fix the problems. The common recommendation is to revert to version 7.5. This works for some people but not others. That is my next step, but I dread the possibility of introducing further errors and glitches.

Very poorly vetted release of version 8.0, especially with the marketing information about how much the book module had been improved. It's not improved. It's broken.