I replaced all Google Fonts with system fonts in the customizer but I can still see several Google Fonts loading. And when looking at the source code of the page, it seems that they are being loaded by Generate Press.
I cleared my website cache and CDN cache but it doesn’t seem to fix the issue.
You are right, Montserrat was still set up for the top bar but I didn’t notice it because the top bar setting my not showing in the settings since I wasn’t using it.
I changed the font setting and Montserrat is not loading anymore but a few other fonts still seem to load (ubuntu, lato.)