I've just noticed the RSS feed on the main website appears to be broken, the last successful parse of it I have is from April 24th if that helps
Visiting the URL directly gives this error:
XML Parsing Error: unclosed CDATA section
Location: https://processwire.com/blog/rss/
Line Number 90, Column 7:
https://validator.w3.org/feed/check.cgi?url=http%3A%2F%2Fprocesswire.com%2Fblog%2Frss%2F#l90