What are the reasons for the frequent problems of values displayed on the Xiaomi Smart Temperature and Humidity Monitor 3?

The reason for the monitor not uploading the values in real-time is listed below:
Uploading the values to the Bluetooth gateway in 1 minute fastest, and in 5 minutes slowest. The duration for the values to be uploaded to the cloud varies depending on the gateway, with most of which taking around 5 to 10 minutes.
The meanings of history data displayed in the monitor are listed below:
Every hour: The minimum time unit for the display page is a day, showing the highest temperature and humidity for each hour;
Day: The highest temperature and humidity for each hour;
Month: The highest and lowest temperature and humidity for each day;
Half-year: The highest and lowest temperature and humidity for every month.
The Xiaomi Home Smart Temperature and Humidity Monitor 3 can store temperature and humidity values for 3 months locally. After the connection with the phone or the connection with a Bluetooth gateway, the locally stored values can be uploaded to the cloud.