Epub document navigated by CTRL+PageUP or PageDOWN turns on huge CPU-USAGE

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Expected behaviour

Actual behaviour

cpu-usage "atril" parent process - 130%, "WebKitWebProcess" - 70%, (2 full core on 4 core cpu), WebKitNetworkProcess - 0%

Steps to reproduce the behaviour

open any epub document (contains index tree)
select reading area
keyboard CTRL+PageDown or CTRL+PageUp
cpu-usage
to stop click mouse to any window-menu; or use mouse click to "Index menu tree" different pos.

MATE general version

mate-about: 1.26.0

Package version

Atril Document Viewer 1.26.0

Linux Distribution

Ubuntu 22.04.3 LTS
5.15.0-88-generic

Link to bugreport of your Distribution (requirement)