Environment variables marked as Sensitive cause authentication failures for my application at runtime. When the same variable is created without the Sensitive flag (identical value), it works correctly. Confirmed across two different services: a Supabase Postgres connection string (Prisma P1000 auth error) and a Resend API key (emails not sending). Both variables work when non-Sensitive, both fail when Sensitive. Tested on https://scottwoodart-8cmhje9l7-scottjwoods-projects.vercel.app/. This appears to affect the feature recommended in the recent security incident bulletin.