Information

Minecraft version: 1.16.4
Forge version: 35.1.13
Environment: Singleplayer

Mod name: Configurable Despawn Timer
Mod version: 1.3

Mod name: Collective
Mod version: 1.53

Description

This is on a fresh install with only these two mods. When using the give command, /give @p minecraft:acacia_boat 1, the command gives one item to the player and drops a phantom item on the ground.

Can confirm this to be true, and with Rats installed, a tamed rat with the harvest command will pick up and put away the phantom item.

Is it that you can't reproduce this issue if the config is set to make items despawn in less than 5 minutes (as opposed to more than 5 minutes)? If so, then this is likely related to MinecraftForge/MinecraftForge#7481.

Thanks for submitting the bug report! This has been fixed via a workaround in version 2.0 of the mod.

https://www.curseforge.com/minecraft/mc-mods/configurable-despawn-timer