When pasting a link with special Characters it will add escape characters, crippling the link

[Moin]

Did you try here or on try.discourse.org?

There was a recent fix related to links after the report in Pasted URLs in Rich Text Editor improperly escape tilde character

https://github.com/discourse/discourse/commit/a20bedb1ed5a9a33f450e63c64b3b9ceb5f124c5