Signing out of Sibi now signs you out of checkout

One session across Sibi and checkout

Checkout kept its own session token for up to twenty-four hours after you signed out of Sibi on the web. The web app would show you signed out while checkout still held the previous session, so the two could disagree about who you were. Checkout sessions are now managed server side and end when your Sibi session ends.

This matters most on a shared machine. Someone who signs out and hands the laptop to a colleague no longer leaves a live checkout session behind them.