Yeah, I've been seeing the same chatter. Google's been fiddling with local pack placements and GBP impressions without any official word. Classic shadow update behaviour-they never announce the stuff that actually hurts.
What I've noticed: it's not a full algorithm rollout, but more like nudges to how proximity and review velocity are weighted. Had a client last week drop from top-3 local to page 2 overnight, no manual action, no traffic change-just a slow bleed in impressions.
Check your GBP insights for "search queries" changes. If you see a dip without a corresponding ranking drop, that's the dead giveaway.
Silent periods like this usually settle in 2-3 weeks, but if you're running local service ads alongside organic, keep an eye on cost-per-lead too. Google tends to squeeze you on the paid side when organic gets shaky.