Why are there duplicate states in the browser history when navigating between pages?

Question

WordPress

Good morning. For the first time, I encountered the problem of duplicate browser state history. If you move backward, you need to press the return button twice, and go forward the first time. I don’t add or change the History state anywhere.
The site is written on WordPress, the PHLOX theme is installed, there is WooCommerce and a PREMMERCE filter.

Who can faced similar? Can plugins intervene via Ajax ? Or can someone tell me how to catch it? Thank you.

Answer 1

You can monitor changes through devtools
in the console, run
monitor(history.pushState)