Forms: Custom html no longer display certain elements

Issue Summary

For Cloud customers migrated from ProForma marketplace app to the native Jira Forms, certain HTML elements in Custom HTML content are no longer supported.

Note: It is no longer possible to insert Custom html into new or existing forms. 

Expected Results

The HTML is convert to ADF and Forms attempt to render the results; however, not all elements will be rendered due to limitations in the converter and also to improve security. 

The following elements will not render at present

• img
• div
• script
• iframe

Workaround

Currently there is no known workaround for this behavior. 

We are gauging impact of this bug and will consider building support for individual html elements.