UTM structure issue, syntax problem?

Hello everyone.

We are trying to understand the problem we have with UTM parameters in our campaigns. I would like to ask if you see any problem with the UTM structure we use in Eloqua?

This code is based on Oracle documentation, but we see some issues when reading emails via Gmail or Outlook mailbox - in the link, the UTM path is missing the campaign name (before the "+" sign).

However, when the email is viewed online the UTM is shown in full and the Campaign Name is shown before the "+".

Do you think there is a bug in this code?