WordPress vs plain HTML: dramaticall change in bounce rate

Hi.

I used custom CMS that generates static HTML files for the website.

Then I switched the website to WordPress, and the 'bounce rate' almost doubled and 'time on page' halved.

I compared pages generated by WP and the static pages using gtmetrix and google page speed. Both variants have almost 100 pagespeed scores and very close numbers in gtmetrix.

The google analytics code is located within the head section on both variants.

Page sizes are 277kb for WordPress and 213kb for static...

WordPress vs plain HTML: dramaticall change in bounce rate WordPress ...