11 Jun 2026 · GA4 · medium severity · fix verified 9 Sept 2026
New Source Group field; Source Platform updates
'Source grouping dimension consolidates values for Facebook, Instagram, TikTok for standardized reporting.'
What it breaks
Reports and explorations keyed on raw source values split what Source Group now merges; saved comparisons and custom channel groups built on 'facebook' vs 'fb' vs 'instagram' drift.
Who it hits: Anyone with custom channel groups or source-based filters.
The fix
Rebuild source-based conditions on Source Group where you want the merged view, and keep the raw source where you do not.
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