It is possible that your satellite internet connection is not stable due to the following reasons:

1. Weather: Look outside and see if there is bad weather like strong wind and storm, which can interfere and disrupt the satellite signals.
2. Incorrect Installation: Check if the dish is correctly set and placed, and if the cable connections are secure and tightened.
3. Receiving Box Installation: Check if the box is correctly installed with good ventilations and sufficient airflow.
4. Obstruction: Check if there are any objects blocking the signals from going to the dish, such as trees, buildings, or hills.
5. Location: Check if the current location is suitable for receiving the satellite signals without difficulties.
6. Data Limit: Check if exceeded the data limit of internet plan, which leads to slower speed internet or service interruption.