Question: High Sierra emoji switching problems.
Upgraded to High Sierra (10.13.1) and noticed that now, when having selected Edit➞Emoji & Symbols, once you select an "alternate" version of an emoji, you can't get the emoji "switch back" to it's original "default" image. Very frustrating. Happens when posting messages running under Google Chrome (61.0.3163.100) or Safari (11.0.1 (13604.3.5)).
iMac, macOS Sierra (10.12.6), mid-2010 i3 iMac w/ 16GB installed