A slide show by a Taiwanese minister caused consternation among US officials during President Joe Biden’s democracy summit on Friday, when it included a map showing the self-ruled island in a different colour to the Chinese mainland.Taiwanese Digital Minister Audrey Tang’s video feed was cut during a panel discussion on “countering digital authoritarianism” and replaced with audio only, at the behest of the White House, according to sources familiar with the matter.The White House offered no…