Streams really shouldn't be providing titles with line-breaks in them but that's something I can look to add a check for when a bookmark is added to strip them out from the title string. With the example stream I'm currently seeing that it's 'title' string is a load of effective stream parameters (from their side) & that it can be quite long which gets close to a compatibility length limit which I'll have to look at modifying.
[edit]
I've now fixed the handling to strip line-breaks along with fixing the title string truncation issue for that stream which shouldn't have been happening so wasn't quite as I initially thought was going on.