Firefox 123.0.1
Windows 10 Pro
Language: Korean, French. Other languages not tested.
Occurrence rate: 100%
I start in page mode, then enter sentence mode. Without interacting with sentence view at all, I change back to page mode. The page immediately advances to the next page without me interacting with the page at all, after a short delay (1-2 seconds).
For example, I am on page 8/11. I go to sentence mode. I go back to page mode. I am still on page 8/11 for a second or two, not touching anything, then the page automatically advances to page 9/11. To keep reading where I was up to, I have to go back one page to page 8/11.
When I go back to the previous page I was on, all the blue words are still blue, as if the paging hadn’t happened.