Does a piece falling off the bottom of the bowl when washing dishes mean that I have a disaster?

Don't think too much. It's okay to drop a piece from the bottom of the bowl when washing dishes, as long as it doesn't hurt your hands. The bowl cracks after a certain period of use or collision. Although it didn't fall off at that time, it happened to fall off when washing dishes this time. It's completely normal and has nothing to do with the disaster. Some porcelain bowls are of poor quality and will inevitably fall off after a period of use. Just be careful when you wash the dishes.