Why is the battery capacity indicator for Laird's RS1xx temperature & relative humidity sensor oscillating from one value to another?

Laird’s RS1xx LoRaWAN temperature & relative humidity sensor’s battery capacity indicator uses the following values for its battery capacity monitoring: 

0 = 0% to 5%

1 = 5% to 20%

2 = 20% to 40%

3 = 40% to 60%

4 = 60% to 80%

5 = 80% to 100%

If the remaining capacity is at a particular threshold (e.g., 5%, 20%, 40%, 60% and 80% capacity), it may result in reporting oscillating values occasionally.