Special characters (german umlauts) as garbeld when using Split Regex

Description

Hi,

I set up the following regex split on my mail handler:
/Von:.(JIRA).[.*mydomain.de]/

Mails that are affected by this regex split are getting garbled special characters:

This is how it looks like without the regex split:

I'm using JEditor to render the comment field.

Thank you!

Environment

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Assignee

Tibor Hegyi

Reporter

Christian Wolf

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