You're not losing it - Google's AI Overviews have always been flaky with their positioning. I've been tracking this in Ahrefs and GSC for a few months now, and here's what I've observed:
- Load-order shift - The overview often renders first, then gets pushed down once the organic results fully load. Google seems to prioritise speed over stability here.
- Query intent matters - For commercial or transactional queries (e.g., "best CRM for startups") I've seen it disappear entirely after a few seconds. For informational queries it hangs around longer.
- Device and location quirks - Mobile and desktop behave differently, same query in Chrome vs Safari can yield different treatment. Location-based tests (UK vs US) also show inconsistent pinning.
honestly, it feels like ongoing SERP testing. Google's not sure whether to keep them pinned or let organic results take priority, so they're A/B testing the hell out of it. I'd bet it's tied to their click-through rate optimisation - if the overview kills clicks, expect it to drop. If it drives engagement up, it'll stay pinned.
noticed the same volatility spike in the last two weeks myself. you're not alone