Zoom on Android tablet jumps between pages

Sometimes when I pinch zoom in or out, the reader jumps up or down along the pages. The size of the jump depends on the location in the document. On page 0 the jump is barely noticeable, but on page 100 in large documents the jumps can be 5 pages or more. This makes me suspect that the position in the document is expressed something like active_page_number*page_height and it is not always immediately updated when a new page height is created by zooming. The discrepancy is small when active_page_number is close to 0.

Only happens when transition = continuous, on both horizontal and vertical settings.

Device info:

https://s3.amazonaws.com/zotero.org/images/forums/u14849826/uhvb8gmdii4atouhpuyr.png
https://s3.amazonaws.com/zotero.org/images/forums/u14849826/sio7xq2xjqn8kzaek4wr.png

Video:
https://photos.app.goo.gl/z3ACwAUVGKK1GMnr6

The video shows the effect is large deep in the document. Then I scroll up to page 0 and the effect disappears.
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