The break+amplify spell breaks bedrock ores once and sets block to air. Bedrock ores are not suppose to turn to air when broken, instead they can be broken infinitely without losing the block.

lines 78 and 126 of Ars-Nouveau/src/main/java/com/hollingsworth/arsnouveau/api/util/BlockUtil.java are likely responsible for this. If you could implement a Block Tag that tells the spell to do everything (block drops, particles, etc.) except replacing the block with air, that would fix the issue.

Thank you for considering this!

https://github.com/dadobug1111/DadobugBedrockOres - The mod in question