I have several custom singularities. It seems like oredict ingredient stop working after one of recent updates.

This is my config:

    S:custom_singularities <
        100;quartz;minecraft:quartz_block;ffffff
        101;experience;ore:itemXP;b3f43b
        102;black_quartz;actuallyadditions:item_misc:5;202122
        103;hard_carbon_alloy;nuclearcraft:alloy:2;265e75
        104;magnesium_diboride_alloy;nuclearcraft:alloy:3;01030e
        105;thorium;nuclearcraft:ingot:3;2d2e32
        106;fluxed_electrum;redstonearsenal:material:32;f68d0e
        107;fluix;appliedenergistics2:material:7;630eb4
     >

Problem line is:

101;experience;ore:itemXP;b3f43b

This how Singularity looks like in game:

Proof that game actually have this oredicted items:

Problem that Experience Singularity doesnt have any recipes like all other custom ones do

I tested - ore:logWood working correct... Weird.

Weird. I will try to reproduce it with vanilla predicts.

Looking through the code it does seem like that should work as long as the OreDict entry exists and is not empty at the time the singularity items are parsed from configs and registered. It's possible that the OreDict is being created afterwards.

I don't recall offhand whether we support oredicts for custom singularities. If the only item with this tag is the bottle o' enchanting, you could try changing from ore:itemXP to minecraft:experience_bottle.