Ingredients for crafting recipes appear red, even if you have them in your inventory

I was using a crafting table and I was crafting something, but the ingredients appeared dark grey, even though I had them in my inventory. I can still craft items. See screenshots

 How to reproduce:

1. /give @s planks 0 2 
2. /give @s crafting_table
3. /gamemode 0
4. Place the crafting table. 
5. Toggle the recipe book so it is on if it is not.
6. Hover over the recipe for a stick with your mouse/cursor. 

Expected results: The ingredients all appear in the crafting grid and have the normal background.

Observed results: They have a red background.

Note: Part of this issue I'm describing has been fixed in 1.16.101 (mentioned by @Math Bjbo.)