Hey @ukic,
You’re using the Classic Editor plugin and it includes its version of TinyMCE and that could be what caused or introduced the empty p tags in your site.
I update my test sites and didn’t encounter this issue. No empty p tags were introduced so this isn’t a bug in our theme.
By the way, please do not use the custom code provided by my colleague previously. It would cause display issues. Paragraphs must have a bottom margin out of the box because otherwise, all your paragraphs would look like a one big paragraph.
If you’re not familiar with using a “search and replace” plugin, please have a 3rd party developer search for empty p tags in your database and remove them.
Regretfully, we can’t perform the fix for you as that would be beyond the scope of our theme support.
Hope that helps.