Yeah, I’d be looking at GSC impressions first too, not just the traffic chart. If it’s one affiliate post and the timing lines up right after plugin updates, I’d still sanity-check the page source for anything weird — canonical changing, noindex by accident, schema getting mangled, that sort of thing. Seen a dumb plugin update break stuff in ways that don’t scream “site is broken” right away. But honestly, if it’s been “all over the place for days,” that sounds a lot more like Google wobbling than your WordPress install suddenly going off the rails. The annoying part is it can look like a site issue even when it isn’t. If you’ve got a few posts doing it, I’d stop obsessing over plugins unless you can point to a specific change. That’s usually a dead end.
ToolDecision
Tools, compared and explained
ToolDecision
Tools, compared and explained