Problem with redraw watchface after o'clock chime rings, or connection lost message

Hi. i building  watchface with many data fields. For energy efficient i use partial refresh only for fields with changed data.
When  o'clock chime rings, or connection lost message, this message draw directly on canvas. And i cannot program  determinate end and start this message to do full refresh screen only one time, for energy savings. Coz one refresh up to 0.5 sec of processor time. 

Any possibility  to determinate end or start  of this message ? i try all methods all fails (