'Why page speed insights is taking field data from a different url if the original one contains a '?'

I have tested some pages which contains parameters "?" in PSI. As a result page speed insights is taking field data from a different url if the original one contains a '?'. Please refer the below snap.

Page Speed Insight - Field data for diff. url

Trying to get to the bottom of whether it's still giving lab data for the right page but showing the incorrect URL under 'This URL'(Field data)...



Solution 1:[1]

Crux field data normalizes the URL a bit. See https://developers.google.com/web/tools/chrome-user-experience-report/api/reference/rest/v1/records/queryRecord#urlnormalization

The lab report will still run on the exact url you give (and follow redirects).

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Connor Clark