html_example.txt (603 Bytes)

I am using LT 6.3 in a Docker Enviroment. It is working fine so far.

I have following Problem / use case:
I want to check an html snippet like in the attachement

When I use Grammatik-, Stil- und Rechtschreibprüfung - LanguageTool I only get the mistake that “iKISS” is wrong.
But when I use my own docker setup I am getting multiple other mistakes. My guess this is due to encoding.
In my programm I use nodejs and encodeURIComponent(). Is there any special encoding on the original side? Do you have any tips for a good encoding?