Spot the bug in the mobile grid

from CSS grid
CSS Grid Layout Module Level 2 intermediate 4 min 1 issue to find

Find the rule that defeats this generated one-column mobile layout.

CSS
.dashboard {
  display: grid;
  grid-template-columns: 14rem minmax(0, 1fr);
  gap: 1rem;
}
.report { grid-column: 2; }

@media (max-width: 40rem) {
  .dashboard {
    grid-template-columns: 1fr;
  }
}
Open in playground
Report an error