When pasting a link without immediately typing a space afterwards, there's no way of adding plain text directly after the hyperlink. The link is always extended.
There should be a possibility to enter text after a hyperlink later, without having to copy the link again, remove it, paste it again and then type the relevant text. Either a space should automatically break the link at that position, so that only plain text is inserted while typing, or it must be possible to at least unlink parts of the text of a link.
I just found out that using arrow keys (left/right) makes it possible to escape a hyperlink while typing.