If you're seeing the mida_conversion event fire in GA4 DebugView from pages where your test isn't running, this is expected behavior.
How it works:
When a visitor completes a goal (e.g., visits a specific page), Mida records that conversion. On subsequent page loads, Mida re-broadcasts the conversion signal to ensure your analytics tools capture it -- even if GA4 or GTM wasn't fully loaded at the exact moment the visitor converted.
The goal itself is only matching on the correct page. What you're seeing in DebugView is the re-broadcast, not the goal firing incorrectly.
Does this affect my data?
No. In GA4, analysis is typically done at the unique user level rather than raw event counts. Even though mida_conversion may fire multiple times for the same visitor, GA4 will count that as one converting user. Your reports should reflect accurate conversion numbers when looking at user-level metrics.
How can I reduce noise in DebugView?
If you'd like cleaner event separation, switch your GA4 integration to Format 2 in the Mida dashboard under Settings > Integrations > GA4. This changes the generic mida_conversion event name to a test-specific name (e.g., mida_conversion_123_Variant_1), making it easy to filter and identify which test triggered each event.