Connecting a lectern to a comparator skips the signal strength of 14

The Bug

When connecting repeaters to redstone dust, then that restone dust connecting to a comparator connecting to a lectern, that redstone skips the signal strength on 14. Ruining builds.

To reproduce:

1. Connect a comparator to a lectern. Make sure it faces opposing it.
2. Place down 15 redstone dust in a row. Do the same for the torches and repeaters. Repeaters come after the dust then the torches.
3. Label a book with numbers 1-15. Make sure to start a new row of pages otherwise it will fail, and one number per page.
4. Watch or have someone watch the repeaters.

→ The lectern skips the strength of 14, even though you are on page 14.