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Issues with GA4 custom dimensions
Mike Ross•2/9/2026•Tech Support
# Troubleshooting GA4 Custom Dimensions
Many media planners in Dubai are seeing discrepancies in their GA4 reporting, particularly when tracking custom event parameters for high-volume campaigns.
## Common Root Causes
The most frequent issue is the 24-48 hour processing delay for custom dimensions. If you've just registered a parameter, it won't show historical data. Additionally, ensure your data layer variables match the casing precisely—GA4 is case-sensitive (e.g., 'Campaign_ID' vs 'campaign_id').
## Best Practices
- **Quota Limits**: Standard properties are limited to 50 event-scoped custom dimensions. Monitor your 'Property settings > Data display > Custom definitions' to avoid hitting limits.
- **Scope Alignment**: Ensure your dimension matches the event trigger frequency. User-scoped dimensions should only be used for traits that don't change often.
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