Reloading the world causes signs and hanging signs to use incorrect texture in editing screen

Steps to Reproduce:

1. Enable the Next Major Update experimental toggle;
2. Place any sign that's not made from oak;
3. Try to edit it;
4. Quit the world and enter again;
5. Try to edit the sign.

Observed Results:
Upon reload, every sign will display the oak sign texture, regardless of which type of wood it's actually made of.

Expected Results:
The editing screen always matches the type of sign that's being edited.

Screenshots/Videos attached: Yes

Notes: