Sp Page Builder Pro homepage issue

Hi,

Allright, I have a very strange issue on my site. Once a select a SP Page Builder Pro Page as a Default home page, it starts messing up my 404 URLs. All the wrong urls (so the once that doesn't exists) after the first slash brings me back to the homepage instead of to the 404 page. When I change the Default home page of Joomla to a single article for example, it all works again. Do you have any idea what the problem could be?

I'm using:
Joomla! 4.0.3 Stable
PHP Version 8.0.10
shaper_helixultimate 2.0.5
SP Page Builder 3.7.15

Thanks in advance,

Martijn Vosbergen