I've never heard that before. Let me look it up. This is interesting. Now I know.

Low Blood Sugar and Loss of Coordination
When your blood sugar drops too low (hypoglycemia), your brain and body don’t get enough glucose for energy. This can affect your balance, coordination, and fine motor skills, which may make you more likely to drop or misplace things.

Why this happens
Glucose is the brain’s main fuel. When levels fall below about 70 mg/dL, the body releases adrenaline (epinephrine) to try to raise them. This can cause shakiness, dizziness, lightheadedness, and weakness Mayo Clinic+1. These symptoms can impair your ability to focus, walk steadily, or control small movements, increasing the chance of dropping objects.