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### Steps to reproduce

1. Login and create a doc of type Experimental on Edge

2. Have a Begin of the insertiontoggleEnd of the insertion list Begin of the deletion with bullet pointsEnd of the deletion and save


### What is the buggy behavior?

1. Toggle lists appear as plain text after a document is saved.


<img class="image_resized op-uc-image op-uc-image_inline" style="width:593px;" src="/api/v3/attachments/782039/content">

Begin of the insertion2\. The same issue applies to Toggle headings

End of the insertion ###

###

###

###

###

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### What is the expected behavior?

1. Toggle list should be correctly displayed as a list with toggle function Begin of the insertion

2. Toggle headings should also workEnd of the insertion


###

### Environment information

**OpenProject version**

**Core build**

[01cdde53fbe71fa80ec2a36ed4bb94523e884d10](https://github.com/opf/openproject/commits/01cdde53fbe71fa80ec2a36ed4bb94523e884d10)

**Product version**

[a58c32168495791b5944adbc577c4f0db8b1af03](https://github.com/opf/saas-openproject/commits/a58c32168495791b5944adbc577c4f0db8b1af03)

**Core version**

OpenProject 16.5.0

**Browser**

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

**Operating System**

* [ ] Windows
* [ ] Mac OS X
* [ ] Mobile iOS
* [ ] Mobile Android
* [x] Linux (please specify distro)
* [ ] Chrome OS
* [ ] Other (please specify)