30 Jul 2026 · GA4 · low severity · fix verified 9 Sept 2026
Diagnostic for missing URL parameters affecting campaign data
'Diagnostic alerts users to missing URL parameters affecting campaign data accuracy.'
What it breaks
Nothing breaks; the diagnostic names the landing pages whose clicks arrive without the parameters the import joins on.
Who it hits: Anyone with a coverage rate below 100% in the validation report.
The fix
Run the UTM audit; fix the templates at the ad platform.
fix artifact · #A-009
Source group and UTM audit checklist
The checks that keep channel reports honest through Google's dimension changes: the Google tag before custom events, one family of traffic-source dimensions per report, Source Group vs raw source, the primary channel group frozen and documented.
- verified_on
- 2026-09-09
- next re-check
- 2026-12-01
- status
- current
Sources linked on every entry · artifacts stamped and re-verified · ← all changes