If you type a message containing a displayed item, it won't be logged at all.

To reproduce...

1. Send any message containing a displayed item (hover over an item with your mouse in your inventory and press control+chat toggle button "T")
2. Open chat again and press the up arrow. Notice that message doesn't appear.

If you have a mod like Blockbot, then any messages containing an item also won't be logged on discord.

If you can, please check if this still applies in version 1.1.0 for Minecraft 1.19.3.
I changed how the mod functions internally, so the messages sent should now be picked up by all such mods.