Hi @haukex sorry I can't give you the whole script due to security and privacy concerns, but I can give you the salient parts of it.
I understand, but please understand that we do need to be able to reproduce the issue you're having on our end, which doesn't require you to disclose any secrets, but it does require you to give us something representative that is runnable as-is (standalone). For example, in what you've posted here, I don't see whether you've changed STDOUT to UTF-8, I don't see any of the Data::Dumper output that I provided in my example code (which is essential to debugging encoding issues), you don't show the output this script is producing on your end, and so on.
If you take the time to read and understand Short, Self-Contained, Correct Example and I know what I mean. Why don't you?, we might be able to help you further, but I'm sorry, as it stands there simply isn't enough coherent information to help you.