@SlackHQ Is it really necessary for the mac app to reload itself when pressing cmd + r? I just accidentally ended a Slack call that way because I wanted to reload a browser window but didn't notice that Slack was the app on top, not the browser 
So sorry! In this case, we've mapped our app refresh button combo onto the pretty common CMD+R for most apps. If you'd like to refresh another app, make sure it's your active one!