What happened
Search Console's page-indexing report has a relapsing bug. Since June 11 it has intermittently stopped showing daily data and fallen back to weekly grouping. Google has patched it more than once, the fix hasn't stuck, and no permanent resolution has shipped. That's roughly seven weeks of a core report you can't fully trust — the same report every store owner opens first when they suspect pages fell out of Google.
The symptom is subtle, which is what makes it dangerous. Your indexed-pages chart doesn't error out or go blank — it just gets coarse. Fewer data points. Flatter lines. Sudden-looking steps where a week of movement got compressed into a single plot point. Nothing on the chart announces that the granularity changed underneath you.
Why this matters
End of July is reporting season. Store owners screenshot this chart for the boss; agencies drop it into monthly client decks. A weekly-grouped chart read as daily either hides a real problem for days or manufactures a fake one — a 'flat' line that's actually a rendering artifact, or a 'cliff' that's seven days of ordinary drift drawn as one step.
Indexing panic is expensive in a specific way: the reflex responses all touch things that were working. People resubmit sitemaps, fire off recrawl requests, start second-guessing robots.txt and canonical tags — against a problem that exists only in how the chart rendered. On a live store, nervous technical edits are how a phantom problem becomes a real one.
There's a trust lesson in here too. This report is the closest thing you get to Google telling you what it holds of your site, and it's been unstable for almost two months. Treat any single Search Console chart as a claim to cross-check, never as a fact to act on by itself.
What to do about it
Check the data-point spacing first
Open Indexing → Pages and hover the recent points on the chart. If consecutive points sit a week apart instead of a day, you're looking at the bug, not your site. Note the date and re-check in a few days before drawing any conclusion about indexed-page counts.
Cross-check the sitemap-level view
Filter the Pages report by an individual sitemap and compare indexed counts against the URL counts you know you submitted. That gives you a second reading that doesn't depend on the glitching chart, and it's the cross-check worth doing before any indexing diagnosis this month.
Keep your own indexed-count baseline
Log indexed and not-indexed totals to a spreadsheet on the same day each month. When Google's own reporting wobbles — as it has since June 11 — your logged series becomes the tiebreaker between 'the site changed' and 'the chart changed.'
Hold the alarm email
If you report to stakeholders or clients, don't send an 'indexing dropped' warning off this chart alone right now. Verify the granularity, run the sitemap cross-check, and then write it up with the caveat attached. A retracted alarm costs more credibility than a two-day delay.