### **Environment**:

qa-edge

OpenProject 11.1.2

### **Steps to reproduce:**

1. Open work package in split screen.
2. Add comment and reference work package with ##.

### **Actual Behavior**

Work package referenced with ## not rendered (referencing with # works properly).

<figure class="image op-uc-figure" style="width:75%;"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/20360/content"></div></figure>

### **Expected Behavior**

Work package referenced with ## not rendered properly. Begin of the insertion

End of the insertion Begin of the deletion



End of the deletion ### Development Notes

* We have two ways of handling wp mentions:
* Old: markdown contains &#39;#id&#39;  Begin of the insertion
* This is also the way it works if we don&#39;t select the wp from the suggestions.End of the insertion
* New: markdown contains &#39;&lt;mention Begin of the insertiondata-id...&#39;End of the insertion Begin of the deletion data-id...&#39; End of the deletion
* Wp mentions:
* data-mention property has &#39;@#id&#39;
* Sometimes link contains undefined Begin of the insertion
* Sending a &lt;mention&gt; tag the 
* Backend:
* Three different scenarios/responses:



<figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/20533/content"></div></figure>

<figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/20534/content"></div></figure>

<figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/20535/content"></div></figure>End of the insertion