Summary

When a customer notification containing an attachment link is sent in plain text format, the attachment link has the incorrect format and can't be opened by the customer.

Steps to Reproduce

1. Create a new Service Desk request from the customer portal, by being logged in as customer1
2. Add a different user (customer2) as a request participant of this request
3. Temporarily give the user customer2 JIRA application access
4. Log in as customer2 from the JIRA login page (not the customer portal login page)
5. Edit the customer2 user profile to receive notifications in plain text format
6. Log back in as customer1 and add an attachment to the request from the customer portal view (for example File.pdf)
7. Check the customer notification received by customer2

Expected Results

The attachment link in the customer notification should match the attachment link from the customer portal view, and from the customer notification in HTML format, which is:
http://localhost:8080/jira810/servicedesk/customershim/secure/attachment/10001/10001_File.pdf?fromIssue=10002

Actual Results

The attachment link in the customer notification has the format of the attachment URL that only agents can view:
http://localhost:8080/jira810/secure/attachment/10001/10001_File.pdf

If the customer clicks on the attachment URL, they will get an error.

Workaround

Change the customer2 user profile to receive notification in HTML format instead of plain text.