Unexpected results when using placeholders like [[TO=lastname]]

[uwe0612-cmd]

When using the placeholder [[TO=lastname]], Quicktext outputs an incorrect value. For example, instead of "Fimpel", it outputs "Eberhardzell]" or other unexpected results.

To Reproduce
Steps to reproduce the behavior:

1. Use Thunderbird (version: 115 ESR and regular, tested both).
2. Install Quicktext (versions: 5.15, 5.18 or 6.3.5, which one doesn't matter).
3. Create a contact with the following fields:
   • First name: Markus
   • Last name: Fimpel
   • Organization: Gemeinde Eberhardzell
4. Use a template like: Guten Tag Frau [[TO=lastname]]!
5. The output is: Guten Tag Frau Eberhardzell]!

Expected behavior
The placeholder should output only the last name, e.g. Fimpel.

Additional information

• The error occurs both with CardBook enabled and disabled.
• Other placeholders like [[TO=fullname]] and [[TO=organisation]] also show unexpected behavior.
• Screenshots attached.

Thanks for your help!
Uwe

Screenshots

[SamuelPlentz]

Cannot reproduce. Could you try what's needed in an empty profile?

[SamuelPlentz]

Have a look into https://github.com/jobisoft/quicktext/wiki/Troubleshooting
4. Fresh profile
5. Reduce as far as possible
7. Isolate errors in existing profiles

[jobisoft]

Note to myself: Sanitize contacts, check for [, [[ , ] and ]] and what actually happens if they are used.