In the 1.20.60.24 preview, the hardened stained glass and hardened stained glass panes IDs got split, into:

hard_<color>_stained_glass

and

hard_<color>_stained_glass_pane

respectively, but these IDs doesn't match the block name, in the "hard" part, that should be "hardened", and this also affects the normal hardened glass and hardened glass panes IDs.