[Tracking] "Unable to upgrade user subscription" error after purchasing professional subscription

[mithunshanbhag]

Describe the bug
User encountered Unable to upgrade user subscription error upon redirect (from stripe checkout portal) after successfully purchasing the professional subscription. Screenshot below.

To Reproduce
TBD

Expected behavior
The user's profile should have been successfully updated (on redirect from stripe) and the user should have seen a Subscription upgraded successfully notification.

Errors in browser console
Unavailable.

Additional details & updates

• [Update 2] I'm now able to reproduce the error. This issue seems to happen only on: Brave browser, Firefox (private mode only). For some reason, the above-mentioned browsers "block" the redirect from the stripe checkout page (still investigating this part).
• [Update 1] Currently, I'm not seeing any errors in the telemetry. The API request to upgrade the user profile (post successful purchase) never reached our API gateway from user's browser.