The problem occurs when I copy from FamilySearch and paste directly to the notes in RM5. If I copy it to notepad and then copy and paste it to notes, it works just fine. This seems to be a new problem with RM5.
FamilySearch appears to be rearranging their website and are breaking existing links. We are aware of this and will be following it and will release an update once it appears they have finished moving them around.