`grid-template` shorthand parsing error

[yisibl]

input

See playground

.grid {
  grid-template-areas: "a a a" "b c c";
  grid-template-rows: 30px 60px 100px;
  grid-template-columns: 1fr 1fr 1fr;
}

output

❌ The grid-template-rows is missing the row with a value of 100px.

.grid {
  grid-template: "a a a" 30px
                 "b c c" 60px
                 / 1fr 1fr 1fr;
}

expected

.grid {
  grid-template: "a a a" 30px
                 "b c c" 60px
                 ". . ." 100px
                 / 1fr 1fr 1fr;
}