Forge has marked their tool tags as deprecated and planned for removal as of 1.19.4: https://github.com/MinecraftForge/MinecraftForge/blob/9abfcbc90b3dc5d7f53fa6227676f81742f4b105/src/main/java/net/minecraftforge/common/Tags.java#L454

It is probably not a good idea to continue to add them to the Vanilla tool tags, like in here:

I believe this to be the root of an incompatibility bug that's been found between The Aether and DivineRPG, since the issue is happening with items we add to the Vanilla pickaxes tag not being found in the tag, and we have since also removed them from the Forge tag after those tags were deprecated. While I am still not 100% sure on this being the root of the issue, since the Forge tag still links back up to the vanilla tag (https://github.com/MinecraftForge/MinecraftForge/blob/1.19.x/src/generated/resources/data/forge/tags/items/tools/pickaxes.json) meaning its weird that there's still an incompatibility here, this should still likely be changed regardless since it will break in the future one way or another.

if this is the issue it should be fixed in the next build
bea28f0
if not its something else