Note 3 Content that is updated periodically by software or that is streamed to the user agent
      is not required to preserve or present information that is generated or received between
      the initiation of the pause and resuming presentation, as this may not be technically
      possible, and in many situations could be misleading to do so. Note 4 An animation that occurs as part of a preload phase or similar situation can be considered
      essential if interaction cannot occur during that phase for all users and if not indicating
      progress could confuse users or cause them to think that content was frozen or broken. Success Criterion 2.2.3 No Timing Understanding No Timing | How to Meet No Timing (Level AAA) Timing is not an essential part of the event or activity presented by the content, except for non-interactive synchronized media and real-time events . Success Criterion 2.2.4 Interruptions Understanding Interruptions | How to Meet Interruptions (Level AAA) Interruptions can be postponed or suppressed by the user, except interruptions involving
      an emergency . Success Criterion 2.2.5 Re-authenticating Understanding Re-authenticating | How to Meet Re-authenticating (Level AAA) When an authenticated session expires, the user can continue the activity without
      loss of data after re-authenticating.