Rheem Heat Pump A/C Mode Delay Cycle In Hot Weather
Actual, better answer:

The heat pump was definitely overheating. Since the heat wave has passed, there have been 0 issues. The ambient outside temperature is 90-95 °F this week, whereas it was 103 - 105 °F last week. This seems to make all the difference as things are purring along and the home is staying cool. Thanks for the help everyone!