Q: A redirect was killing 22% of our form conversions — how was it caught?

Q: A redirect was killing 22% of our form conversions — how was it caught?

A: A lead site fired its conversion on a /thank-you page, but a marketing redirect sometimes sent users to /thank-you/ (trailing slash) which had no tag:
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DebugView: replayed a real submission and saw no conversion on the slash variant
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Found two URL versions in Engagement → Pages and screens
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Moved the conversion trigger from the URL match to the form's submit event instead

After switching from page-URL tracking to event-based tracking, reported form conversions jumped 22% overnight — those leads were always real, just untracked.

TL;DR: URL-match conversions break on redirects and trailing slashes. Trigger on the actual submit event and recover the silent losses.

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