SSR is newly onboarded onto Mist. After the onboarding, it shows Gateway Bandwidth SLE is degraded under Insights - WAN - Gateway Bandwidth. The percentage values are in 50% or below range even though the wan links have been up.
If the devices were just newly added to mist managed, it takes a few days for Mist to generate accurate telemetry since some of the graphical data are based on past 1-2 weeks of data. This is especially true for devices that were only used for telemetry in Mist and were later migrated to fully mist managed(config and telemetry). For additional information refer to below docs:
https://www.juniper.net/documentation/us/en/software/mist/mist-wan/shared-content/topics/topic-map/wan-sle.html