Konversation cuts input text when it exceeds max allowed char amount. The problem is that it cuts URLs too. It should bring them entirely in a new line instead of cutting them Reproducible: Always
This sounds like a limitation of IRC in general. I just pasted a URL from the bug tracker and it splits to multiple lines and breaks the link. I'm not sure this can be fixed.
Justin is correct. This is one of the reasons URL shorteners exist.