Slack icon not visible any more in notification area : <p>Not sure why but since recently, the <code>Slack</code> icon in bottom right notification area (Windows 10) isn't visible anymore despite Slack app being checked in "Select which icons appear on the taskbar" section. Consequently I need to keep <code>Slack</code> open at all times in my app bar (which I don't want because it's crowded).</p>

<p>Any idea what's causing the problem here?</p>
