I am not sure if this is a known bug but after updating to
2021.09.19.1731 Spectrum no longer gives the option to "Rescan All Channels".
I only get Rescan New Channels & Troubleshoot.
My other providers still get "Rescan All Channels" option
Logs have been submitted as
c1020d7d-0689-42d8-955d-9f9ab853cbc9