Versions

WorldEdit version: Bug is present in build 5015 to 5187, and is NOT present in build 4965.
Platform version: Bukkit 1.16.1.

Describe the bug

Command feedback is partially missing. It looks like some materials/arguments/... are translated to empty strings. See image with the result of //distr without printed material names and //set///replace with missing argument descriptors:

To Reproduce

1. Start a Bukkit 1.16.1 server with an affected WorldEdit build.
2. Run the mentioned commands and notice the missing feedback.

Expected behavior

The feedback should contain the strings as printed in the mentioned unaffected build instead of being empty strings.

Screenshots

See above.

Additional context

Bukkit is not server software, it's an api. Please actually give the output of /version.
also like

works fine so yea. gonna need actual repro.

If Bukkit doesn't have the API required, then which calls are made to what to send the feedback? Since this bug is also present on Spigot 1.16.1 consoles, I'm guessing that a translation fallback there would also be fitting to solve the bug for CraftBukkit players and console.

The issue occurs on CraftBukkit 1.16.1, and not on Spigot 1.16.1. But as this is the Bukkit version of WorldEdit, it should work on both. Note that on console on Spigot, the bug is also present.

Turns out bukkit has 0 api for any of the text component stuff mojang has added in the past 6 years (surprise, bukkit has been dead for 6 years), so the distinction between craftbukkit and spigot is extremely meaningful. Not sure why you decided to just omit that.