DisplayName not displayed in Taskpane vs Resize Taskpane

[pstaffan]

Provide required information needed to triage your issue

Your Environment

• Platform [PC desktop, Mac, iOS, Office on the web]: Office on the web
• Host [Excel, Word, PowerPoint, etc.]: Powerpoint
• Office version number: 2401
• Operating System: Ubuntu 22.04
• Browser (if using Office on the web): Chromium Version 121.0.6167.160 (Official Build) snap (64-bit)

Expected behavior

DisplayName from the manifest should be displayed in the Taskpane inside "

my-display-name

"

Current behavior

The div is empty: "

"
This also causes the X to close the taskpane be cut in half so there is very little area to click to use it

Steps to reproduce

1. Enable Runtime for the add-in
   
   
   
   
   
2. Load the Add-in

Provide additional details

Important! Resizing the taskpane works when there is no display name but doesn't when there is, it is better to have resize capability than to see the display name so if fixing the reported issue, please don't break the resize

Context

The UI looks unprofessional, and it is difficult for the users to click the X to close the taskpane.
I'm creating a new Add-in that utilizes the taskpane to edit diagrams and inserting them into the document.

Useful logs

Screenshot showing the issue, using yellow background for body in taskpane.html so that half X isn't visible

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[pstaffan]

Sorry, lost the xml for "Enable Runtime for the add-in" above, here it is:

            <Host xsi:type="Presentation">
                <Runtimes>
                    <Runtime resid="Taskpane.Url" lifetime="long" />
                </Runtimes>
                <DesktopFormFactor>
                    <GetStarted>
                        <Title resid="GetStarted.Title"/>
                        <Description resid="GetStarted.Description"/>
                        <LearnMoreUrl resid="GetStarted.LearnMoreUrl"/>
                    </GetStarted>
                     <FunctionFile resid="Taskpane.Url" />