The reasons for this situation are as follows:

1. The oil temperature at the bottom of the pot is not enough: the oil temperature at the bottom of the pot is not enough, causing the oil temperature at the bottom of the pot to be high and low, thus affecting the improve the stability of the fountain.

2. The oil temperature at the bottom of the pot is too high: The oil temperature at the bottom of the pot is too high, causing the oil to burn at the bottom of the pot, thus affecting the stability of the fountain.

3. Fountain device failure: Fountain device failure, such as blockage or damage, will also cause the fountain to spray bursts.

4. Insufficient oil at the bottom of the pot: Insufficient oil at the bottom of the pot causes the oil temperature at the bottom of the pot to be insufficient, thus affecting the stability of the fountain.

5. The oil at the bottom of the pot is of poor quality: The oil at the bottom of the pot is of poor quality, such as old oil or impure oil, which will also affect the stability of the fountain.