Hi again!
I looked at the issue and I’m carefully assuming another (optimization?) plugin is doing this.
The thing is that it only occurs with the preloaded fonts, but the way they’re inserted is modified entirely. It should look like this:
<link id="omgf-preload-0" rel="preload" href="https://path.com/to/preloaded/file.woff2" />
But, it’s changed to an inline style:
<style id="omgf-preload-0" media="print">[weird encoded characters]</style>
Which makes no sense, because you can’t preload an inline style. So, I don’t know why this plugin is doing this. It’s like it’s trying to insert the literal contents of the file inline?
Like I said, this looks like the work of an optimization plugin, so I’d start with disabling those to see if that resolves the issue. Then you can narrow it down by enabling them again one by one.
Looking forward to your findings!