Sewage backing up into your bathroom shower or tub drains when you attempt to flush, which indicates a main sewer line blockage.
Sometimes the computer simply glitches.
Skip the old-fashioned flange plunger (cup plunger). It’s useless on modern trapways.
The "deposit" she just made floats up, threatening to breach the surface like a brown submarine.
Disclaimer: This article is for informational purposes. Always consult a licensed plumber for Category 3 water damage.