Seems like I'm having similar issue. My firmware is MS15.21.1. Would anyone know if this is still an ongoing issue. Below is the error I'm getting:   9/19/23 16:42 Spanning Tree Port RSTP role change Port 23 designated→disabled 9/19/23 16:42 Switch port Port status change port: 23, old: 1Gfdx, new: down 9/19/23 16:42 Switch port Port cycle ports: 23, downtime: 5 9/19/23 16:42 Switch port Cable test ports: 23   9/19/23 16:31 Spanning Tree Port RSTP role change Port 23 disabled→designated 9/19/23 16:31 Switch port Port status change port: 23, old: down, new: 1Gfdx 9/19/23 16:31 Spanning Tree Port RSTP role change Port 23 designated→disabled 9/19/23 16:31 Switch port Port status change port: 23, old: 1Gfdx, new: down 9/19/23 16:31 Spanning Tree Port RSTP role change Port 23 disabled→designated 9/19/23 16:31 Switch port Port status change port: 23, old: down, new: 1Gfdx 9/19/23 16:30 Switch port Port cycle ports: 23, downtime: 5 9/19/23 15:20 Spanning Tree Port RSTP role change Port 23 designated→disabled 9/19/23 15:20 Switch port Port status change port: 23, old: 100fdx, new: down 9/19/23 15:20 Spanning Tree Port RSTP role change Port 23 disabled→designated ... View more