[minsik]

Recently in reading in calibre reader the control page up and control page down doesn't seem to be working.

in most cases the control left or control right moves to the beginning of the chapter or end of the chapter but the chapter jump to previous and next chapter doesn't work anymore.
Keyboard assignments appear correct, just don't work.
As this is a most used feature its a bit of a problem for me. jumping through a book.
Is there any suggestion to make it work or alternative keystrokes?

chapters exist and these can be selected to jump directly to the chapter.
If using control and page down it likely jumps to the end of the book just like control end.
if using control and page up inside a chapter it will go to the beginning of that chapter but not traverse across to the previous chapter and so on. If i manually control left it will go to the beginning of a chapter, then manually arrow up across into the previous chapter and then control page up with go to the beginning of that chapter only.

I now discover only with epub, after epub is converted to azw3 that works ok.

This is currently 4.18 windows 10 64bit desktop computer.