Im writing a report that should display the information as a simple list however the problem is that when the data has the special german characters ä, ö, ü, ß it does not display them properly

• instead of t-field i have already tried t-esc 
• I have also tried t-esc with a function that replaces every special character with their utf-8 escape code but that did not work either
• i have looked at how odoo does it in their reports but they do not seem to be using anything special (also just t-field)
  
• I have included the meta charset utf-8 tag
• I have also marked the xml with encoding = UTF-8
• I have also looked into the database using pgAdmin and found that the special characters seem to be stored correctly
• To test, I also changed the report type to HTML and it works there so it may be a problem with wkhtmltopdf?
  

This is the current report code:

(I have left out css styling since it shouldnt be necessary (The only thing I change is font and spacing)

Thank you for your help.

(the forum cant handle the code properly so I pasted it on pastebin)
https://pastebin.com/D7qmHNJQ