How to fix my switch keeps become STP new root?

Zyxel_Melen

The switch becomes the STP new root means the connection to the root has an issue, like disconnected or BPDU packets missing, this will cause the switch to re-elect the STP root and re-learn the MAC table. This will cause the connection under this switch to be disconnected temporarily.

Please check whether the connection between this switch and its uplink switch is fine or not. If a WiFi bridge is used to connect, please ensure the signal strength is not weak.