Why can't I type a left parentheses in Cloud Shell?
When I type a Shift+9 (English keyboard) at the Cloud Shell prompt, the cursor stops blinking, becomes a hollow rectangle, and the Cloud Shell window loses mouse focus. No left parentheses appears on the screen. I've tried this in four different browsers and different computers - both PC and Mac - and with different logins. The behavior is the same in all cases - both in Bash and PowerShell. I don't experience this issue when typing any other characters.
What am I missing?