There is something wrong with the quiz answer and the reality.
Quiz:
Q: When will the warning message for my desk be triggered on my Request for Quotation?
Video "Purchase Lead Time"
When Amy creates new RFQ, and chooses vendor "Deco Addict", system shows:
Warning for Deco Addict: Will not delivery chairs after 07/07/19
I wonder: Is the answer that needs correction or Odoo13?
I agree. I had the same question. The warning actually pops up when you enter the vendor not the product.