Hi there,
that request is being made by the GenerateBlocks Plugin, which means somewhere on your site you have set the a GenerateBlocks typography option.
I scanned your Stylesheets looking for the CSS that is using the Lora font. And if found these:
gb-headline-slider-hl
– is this a Global Style
And then in the home page there i a Grid with 3 columns ( Schwimmbad, Floating, Sauna ). The Container Blocks in those columns has the font set there.
You need to edit each of those blocks and tell it NOT to load the google font.