In my opinion, From my experience, yeah, I wouldn’t call that “normal” just because it happened after an update. If Search Console impressions are bouncing around that hard, I’d at least check whether the same URLs are still the ones actually getting served/crawled. I’ve seen “same site, nothing changed” turn into some dumb canonical or rendering weirdness after a plugin update or cache layer hiccup. That said, if crawl stats are still basically normal and you’re not seeing errors, I’d hold off on ripping stuff apart for a couple days. Google does love doing the whole fake panic thing where everything looks broken and then it settles for no obvious reason. If it keeps sliding though, then yeah, stop staring at impressions and look at logs / URL inspection / a couple of your top pages. That’s usually where the annoying answer is.
ToolDecision
Tools, compared and explained
ToolDecision
Tools, compared and explained