Broken screenshot links in attachments

[da_danilov]

We are using Jira Service Desk 8.5.3 Server

Whats going on:

1. There is a post function “Send an Email” from JWT upon transition, the sending of which is at the user's request.

2. Rendered by JEditor

As a result, the attached image is not displayed correctly in the email

Proper link should like this: https://www.domain.com/jira/secure/attachment/112423/pastedImage.png

But we've got this: https://www.domain.com/jira/secure/attachment/112423/pastedImage.png&proxy=yes&key=41f95bd51684af5c186fdc357870dc8

So the question is: what could it be and how can it be fixed?

Thank you in advance for your response.