No Sessions on Segment integration with Amplitude Actions

In Segment, I have two JS sources for our Test and Production environments. And the respective destinations to Amplitude Actions.

Both destinations share the same configuration. Nevertheless, I see sessions in the Test environment but not in the Production environment.

• Page calls & Track calls Mappings for Session ID in both destinations are configured as so:

• If I look at the raw events in the debugger, page and track events from both the Test & Production Environments come with an “integrations” object:

"integrations": {
    "Actions Amplitude": {
      "session_id": 1644244386047
    }
  }

• In Amplitude, Test & Production projects share the same session definition:

• Nevertheless, in Amplitude I can see sessions in session charts for Test project but not for the Production project.

Any ideas why this is not working on Production?