Only to the media, and liberal politicians who wanted to make hay over it. Flynn's work had nothing to do with the campaign, or with Trump, but because neither group would ever point that out in statements, or news articles, they'll simply twist the facts to achieve the greatest effect.
1. Do you have any idea what a conflict of interest is?
2. Would you feel the same way if this was a Democrat political hack in the Clinton campaign working as a lobbyist for a foreign government?