Comment 2 for bug 1863438

Try browsing the book in Paged mode first and then switch to Flow mode, whenever I change the autoscroll speed I will be jumped back to where I was when I switched to Flow mode.

Try this steps:

1) Open book
2) Switch to Paged mode
2) Browse book to next chapter
3) Switch to Flow mode
4) Start autoscroll
5) Wait for a while for some page turns to occur
5) Open preferences and change autoscroll speed from 1 to 1.55
6) Close preferences
7) You are jumped back to where you switched to Flow mode in step 3)