Response:

Check to see if an issue already exists for this probem.

Or check if it really is a problem? What is it supposed to do?

Reference:

• Step 12 – Has it happened before?
• Step 16 – Requirements vs specs

Related questions:

• Did it work last time?
• Has it been tested?
• Has it happened before?
• Have you already fixed the problem?
• Have you raised an issue?
• Is this a known problem?
• When did the problem occur?