Setup is Pixel 7 pro, main profile only with private folder use for google needy apps.
Have been using Proton VPN (Paid) for several years now and almost exclusively the secure core connection. Speed has always been acceptable (100mbps) even though it's throttled considerably vs a normal VPN connection through Proton. This has been the case on stock android on the 7 pro and various custom roms on older phones (Pixel 3aXL, Samsung Note 10 Plus, etc.).
With GOS, secure core is 100% unusable - as if the kill switch were enabled and the VPN were turned off. This very well could be due to something I've done but I can't think of what that might be. I'm now using fastest country other than US which has mostly been Canada. Speeds of 150mbps which is fine but I'd rather be on secure core especially when banking.
Has anyone else experience this issue? What might I check to resolve the problem?