Change the look panel, no themes available

When I look at different tenants at the moment in the Change the look panel on a Communication site, there are no themes available. When I open up PowerShell and enter Get-PnPTenantTheme, several themes are retrieved and so available in my tenant. Does anybody else experience this?

What I also see is that in my SPFx web part, when I try to retrieve a theme color in my sass file with:  

"[theme:neutralLight, default: #eaeaea]" it doesn't give me back any color, even not the default specified.