A regex capture group returned the right value (trailing[1] = "1:30"), but the bench still showed interval=null. The bug wasn't capture — it was that the return path had three branches: capturedInterval, then intervalInTrailing from trailingText.match, then a stripped suffix. A later branch with a different regex pattern was overwriting the correct value. When debugging regex extraction, verify each named extraction path independently — don't trust the print statement at the end of the chain.
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