Forging dust level up failure

I don’t understand why this is hit or miss. It is very annoying to try to level up an artifact that says chances=very high, and then lose 12,000 forging dust. This will be the reason I dump this game.

Same thing happens to me save up17,500 for one thing 3 times it failed, with rhui I saved up 30,000 to level up shin boots to ten happened again