It's not recommended to run the Starr apps through a VPN, what can happen is that the Starr apps doesn't update the posters or metadata or you can't add new movies/tv shows, it doesn't need to happen right away. but sooner or later it can and probably will happen.
!!! danger "To be clear it is not a matter if VPNs will cause issues with the Starr Apps, but when: image providers will block you and cloudflare is in front of most of Starr servers (updates, metadata, etc.) and liable to block you too"
Just run VPN on the apps that actually need it, like your torrent client, and perhaps in some cases certain indexers because of region/ISP restriction.