You can craft impulse item duct in twilight forest uncrafting table, 6 regular itemduct + 1 lead plate gives you 1 opaque impulse if u select the correct recipe.

Please follow the bug issue creation format, or edit your message to follow that format.

Fixed the Impulse Itemduct recipes in 2.5.0: https://www.curseforge.com/minecraft/modpacks/divine-journey-2/files/3472385