Version in customizer is not the same as in real life

Hi,

In the Customizer, the website looks fine, with everything I want there to be. However, when I visit the website without being logged in (www.ladiesonlybjj.nl), there are some old image widgets that I’ve replaced, but still the old ones show up! Same as the Archive, it only shows March 2017 as the most recent – while in the Customizer view, I can see it’s been updated to the most recent Archive.
The same happens if I check the website on my mobile phone, and desktop Incognito. However, clicking on links of recent blog posts does get me to where I want to be – it’s just that the Home Page seems off.

I’ve done all the recent updates to the latest version of WordPress. Is there somehow a limit to Fashionista, that I keep viewing the not-updated version of my own website??

Thanks in advance!