Hello,
Thank you for making a bug report. As described, this interaction is working as intended.
You are attempting to apply the logic of Skill drain vs cards that Tribute for cost compared to cards that negate a card while it is on the field.
Skill drain is a card that has its effect applied continuously, this means that as long as a card is on the field and face-up, it is affected by skill drain. If a monster tributes itself for cost, it is not face-up on the field for Skill drain to apply its effect to.
This is different from targeted negation. A card that applies its negation to a target will negate that card’s effects whether or not it is on the field during the resolution of its own effects. The “face-up” portion only means that it must be face-up, on the field at the point of the targeted negation card resolves, and that it won’t negate any card effects that activate in the graveyard. Card resolve their effects where they are activate. So once the effect veiler has applied its negation, even if the Flame Wingman IR tributes itself for cost, its effect is still activating and resolving on the field. Because of this, it resolves negated since effect veiler successfully applied its negation.
If you have any further questions about this, you can look into rulings such as Effect Veiler vs Rescue Cat, a much older ruling but applies the same way.
You can also ask for an explaination in the Duelist Unite Discord Server’s #rulings channel for judges to explain this to you if you wish for a second ruling.
Once again, Thank you for helping to make YGO Omega be the best it can be.
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