Our dataflows have jumped from 5 minutes to sometimes timing out at 3 hour limit. The gateways involved have all been updated to the latest version, and one dataflow doesn't even connect through a gateway because all sources are web.
Around the same time this started happening, publishing reports with exisiting datasets have started taking forever (30+ mins). Twice now I've received a 500 error while trying to publish. Previously they took under 30s (8mb report), and if I delete the existing report and dataset pubishing speed is restored to this.
Even navigating PowerBI.com through the workspace settings has gotten slow and unreliable. Just now I got an error with a picture of an owl and the following message:
TECHNICAL DETAILS Power BI was unable to read the application metadata. Please check the Power BI service status in the below support page and try again later.