Self-links in Mermaid cause the Diagram to be inserted as an Image

[r1ch]

Preflight Checklist

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Description

Mermaid entity-relationship diagrams with self-links are always inserted as an Image

Reproduction

Steps to reproduce the behaviour:

1. File > New
2. Blank Diagram
3. Arrange > Insert > Mermaid...
4. Select "Diagram" in the drop down

Paste one of the following:

Minimal example that triggers the bug:

erDiagram

D["Draw.io"]
P["Pen and paper"]

D ||--|| D : "The best drawing tool since"

Note that this is inserted as a Image (you cannot edit / drag components)

Minimal correction (D->P)

This is the same as the above but the link now goes D-->P, not D-->D (self-link)

erDiagram

D["Draw.io"]
P["Pen and paper"]

D ||--|| P : "The best drawing tool since"

Note that this is inserted as a Diagram (you can select / edit / move the compoents)

Expected behaviour

I would expect the diagram to be drawn exactly as it is
But inserted as a Diagram (not an Image) so that the components are editable / can be dragged / lines moved.

Screenshots

Inline above

draw.io version

v29.7.9

Desktop:

• OS: Mac OS Tahoe 26.4.1
• Browser: Chrome
• Browser Version: 147.0.7727.102 (Official Build) (arm64)

I tested the problem in incognito/private mode with all browser extensions switched off, write "yes" below:
yes

[m-mohamedin]

Thanks for the report, it will be fixed in the next release