Switch statements, app lab

A student of mine wanted to try out switch statements in app lab. Despite the correct syntax, the app will not function properly when the drop down change is from Friday to Saturday. Going on the forums, I noticed a post in which there appeared to be a bug in the code interpreter: AP Lab Switch not working?.

Here is the link to my student’s project: https://studio.code.org/projects/applab/Gnqx7WiXxns-dPYh8xQlGlCrM7C-G69uGpJ8Mw-ckx8

Please advise if the issue is a result of a bug. Thank you.