Hi @NianticModKIC,
I believe @allthethings is referring to this issue: 素材詳細画面においてお気に入り登録した装備が表示されない場合がある / Favorited equipment may not display in the material details screen
For some people, the issue occurs only for some of the favourited equipment, where if they marked Equipment A and Equipment B as favourites, only the materials needed for forging/upgrading Equipment A will show the green bookmark icon on them while the materials needed for forging/upgrading Equipment B will not have the green bookmark icon.
For my case (and probably OP’s case too), NONE of my materials have any green bookmarks at all since updating to v108, as if I don’t have any upgradeable/forgeable equipment favourited (which I definitely do have some equipment that are not at 10.5, especially my favourited armour pieces that I don’t intend to upgrade further but I want them favourited nonetheless).