What about a concentration during attack action or a move action?

@PopeJewish While concentrating on a spell, casting another spell doesn't break your concentration unless the second spell also requires it.

— Jeremy Crawford (@JeremyECrawford) April 11, 2015

@HoobsterRawlWhat about an attack action or a move action? “Normal activity, such as moving and attacking, doesn’t interfere with concentration” (PH, pg. 203). @PopeJewish

— Jeremy Crawford (@JeremyECrawford) April 15, 2015