It's a known issue that 5* Safeguard and Skilled red talismans are no match against Fierce talismans of the same level. And the same is true for Overwhelming green talismans against Mystical and Ward talismans. Some even say that these weaker talismans are direct vendor trash.
And so I'm asking: Is this difference intended or it's a bug that is going to be corrected? I hope it's the latter. Not only is frustrating to get what you don't want when farming, but also these limitations in options.