Learn React Bug

Hi,

I found a Bug or Error, maybe its only on my Machine? (Mac, Catalina, Chrome)
I am learning React with your /learn site - it is AWESOME by the way, thanks!.

I am at the Topic: “React: Create a Controlled Input”

When I wrote the Code, i can confirm it is correct by do the tests.
But if I test it by myself, typing something in the input field, it crashes.

Look the screenshot to see details of my browsers console.

Your “Run the Tests” says it is right, so i can proceed, but I just want to inform.

Greetings,
Manuel Brenner!

Bildschirmfoto 2020-10-14 um 09.01.45|690x302