Conversions from Google Ads and Microsoft Ads are being incorrectly attributed as organic.

Presently, my conversions (specifically, form submissions) are being tracked as Google/Organic or Bing/Organic instead of being categorized as paid.

I'm confident that these leads originate from paid channels because they occur on an Unbounce page to which we exclusively direct paid traffic, and Unbounce correctly attributes them as such.

We've established UTM parameters and configured auto-tagging. Has anyone encountered a similar problem in the past?

Verify the attribution settings in GA4. It may be configured for Google paid and organic attribution. Also, do check out this Google Support Article Link about Default channel grouping