Copper lanterns appear light gray on maps at every oxidation stage

The Bug:

Copper lanterns appear light gray on maps at every oxidation stage.

Copper doors, trapdoors, grates, bulbs, chests, golem statues, and lightning rods change their map color as they oxidize. Copper lanterns always appear in the same light gray as regular lanterns on maps, whether they are unaffected or fully oxidized, therefore introducing an inconsistency.

Steps to Reproduce:

1. Summon some waxed copper lanterns and waxed oxidized copper lanterns by using the commands provided below.

   /fill ~2 ~ ~2 ~11 ~ ~11 minecraft:waxed_copper_lantern

   /fill ~2 ~ ~-11 ~11 ~ ~-2 minecraft:waxed_oxidized_copper_lantern

2. Obtain an empty map, use it, and look at the color of the copper lanterns.

Observed Behavior:

Copper lanterns appear light gray on maps at every oxidation stage.

Expected Behavior:

Copper lanterns would appear in the map color of their oxidation stage, like copper doors, trapdoors, and other copper blocks.