Enfys Nest Special "Sudden Impact" Not Working As Intended

For ease I am going to just port over your format from my last report:

How often does the bug occur? Every time (100%)
Summarize your bug Enfys Nest's special, "Sudden Impact", does not work as stated. The ability reads: "Deal Physical damage to target enemy, Stun them for 1 turn, and inflict Buff Immunity for 3 turns. If that target had any Protection, this attack deals 50% more damage and ignores Armor. " However, with the mechanics image below and my screenshots of a near identical setup, it shows that the armor ignore entirely depends on the stun landing and not simply if the target has protection remaining. Note the resist on the one where the damage drops off hugely.
Steps: How can we find the bug ourselves? Use Enfys Nest's "Sudden Impact" ability against an enemy with tenacity up, or until you get a resist on your stun. The damage will be significantly lower than expected. I did this in the current galactic challenge a number of times and (as shown in my graph below), when you get a 15% base resist, it doesnt work as intended. That is clearly seperate from the regular damage variation.

Thank you! ^^