### Steps to reproduce

1. Begin of the insertionCreateEnd of the insertion Begin of the deletion Log in to OpenProject asEnd of the deletion a Begin of the insertionnew meeting using FirefoxEnd of the insertion Begin of the deletion project member / adminEnd of the deletion
2. Begin of the insertionclose the agendaEnd of the insertion Begin of the deletion Go to any meeting of a projectEnd of the deletion
3. Begin of the insertiontype some short text inEnd of the insertion Begin of the deletion EditEnd of the deletion the Begin of the insertionMinutes text fieldEnd of the insertion Begin of the deletion meeting minutesEnd of the deletion
4. Begin of the insertiongo with the cursor in front of the first letter and insertEnd of the insertion Begin of the deletion InsertEnd of the deletion a table of contents Begin of the deletion at the top of the editorEnd of the deletion
5. Begin of the insertionmake the text that was typed just before asEnd of the insertion Begin of the deletion AddEnd of the deletion a heading 1 Begin of the deletion anywhereEnd of the deletion
6. Begin of the insertionclickEnd of the insertion Begin of the deletion ClickEnd of the deletion on Begin of the insertiontoggleEnd of the insertion Begin of the deletion "ToggleEnd of the deletion preview Begin of the insertionmode
7. as nothing happens, click againEnd of the insertion Begin of the deletion mode"End of the deletion

### What is the buggy behavior?

* The Begin of the insertioncontent is lost
End of the insertion Begin of the deletion editor first does nothing for a short period and then throws an error:

<figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/56549/content"></div></figure>

End of the deletion * Begin of the insertionIf you clickEnd of the insertion Begin of the deletion Any changes to the meeting minutes are lost in the preview, but remain when clickingEnd of the deletion on Begin of the insertionsave, the page will only show &quot;undefined&quot;End of the insertion Begin of the deletion &quot;save&quot;End of the deletion

### What is the expected behavior?

* No Begin of the insertioncontentEnd of the insertion Begin of the deletion errorEnd of the deletion should be Begin of the insertionlostEnd of the insertion Begin of the deletion thrown for toggling preview mode
* Changes should remain in preview modeEnd of the deletion

### Begin of the deletion Screenshots and other files

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/56550/content">



###End of the deletion Environment information

**OpenProject installation type**

* [ ] Hosted cloud edition
* [x] Packaged installation
* What distribution? --&gt; Ubuntu 22.04.02 LTS
* [ ] Docker All-in-one container
* [ ] Docker-compose installation
* [ ] Other (please specify)

**OpenProject version**

Begin of the insertionv12.5.4, 13.2End of the insertion Begin of the deletion v12.5.4End of the deletion

**Browser**

* [ ] Chrome
* [x] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Language**

English