Is there an existing issue for this?

• I did not find any existing issues.

Current Behavior

Most items lose the dark blue mod name ("Ender IO", "Ender IO Gear", etc.) in tooltip when the item is updated in any way, like when a setting is changed.

This occurs ONLY in player inventory GUI - the mod name still shows when an external GUI is opened (no matter if it is vanilla (e.g. furnace), EnderIO, or other mod).

This also happens when a conduit facade is painted.

Also with chargable items.

This bug does not happen with the "" extra tooltip information in something like the item conduit.

Expected Behavior

Mod name should always stay in tooltip when hovered in inventory.

How to Test

1. Get an item filter (or any other filter with an openable GUI)
2. Edit data to it in any way, like
3. Open inventory (NOT a machine's GUI)
4. See tooltip - dark blue mod name should be missing

Local Environment

dev/1.21.1 runClient environment (8.0-dev+bfada24e6), on Java 21.0.8

Any Additional Information?

No response

Can you try this with items from something like Mekanism? I'm pretty sure this is expected behaviour

Oh yeah, you're right the issue occurs with Mek items too - maybe an issue with NeoForge then?