Its not a bug , u just didnt clear the debuffs

Gaara [Swimsuit]

At the beginning of every round, causes unavoidable small damage and Discouragement to up to 4 units in the opponent's lineup.

Debuff Discouragement: Units suffering from this Debuff cannot receive additional Buffs and Shields. Lasts until the end of the next round or

until that unit executes a Mystery. Discouragement is Irremovable and neglects Immunity.

In your situation, 4 units of ninjas have the debuff discouragement. To remove the debuff you need to use 1 mystery for that unit. Basically only Yagura use myst so the immunity buff that you copied only got applied to Yagura whereas the other 3 nin with discouragement debuff cannot receive the immunity buffs.

I know, but according to you it's not a bug, why don't you explain to me why it happens occasionally, after all I specified "Yagura is left alive with 1 life (AND ONLY OCCASIONALLY OTHERS)"

By that I mean that the bug is that Yagura is sometimes the only one left alive and sometimes all the team members

Because you didn't clear the discouragement debuff

Other Element Nature Training

- Yagura copy the ninja

>Unit 1 = Gain Immunity 2 Rounds Buff

>Unit 2 = Gain Immunity 2 Rounds Buff

>Unit 3 = Gain Immunity 2 Rounds Buff

>Unit 4 = Gain Immunity 2 Rounds Buff

Wind Element Nature Training

-Gaara Swimsuit does his trigger, causes unavoidable small damage and Discouragement to 4 units

>Unit 1 (Discouragement) =

>Unit 2 (Discouragement) =

>Unit 3 [Yagura] (Discouragement) =

>Unit 4[Clone] (No Debuff) =

>Unit 5 (Discouragement) =

- Gaara Swimsuit only hits 4 units

- Yagura uses myst to copy the ninja

- Because Yagura use myst, the discouragement debuff on him only got cleared

>Unit 1 (Discouragement) = Because discouragement, no buff can be gain

>Unit 2 (Discouragement) = Because discouragement, no buff can be gain

>Unit 3 [Yagura] (No Debuff) = Gain Immunity 2 Rounds Buff

>Unit 4[Clone] (No Debuff) = Gain Immunity 2 Rounds Buff

>Unit 5 (Discouragement) = Because discouragement, no buff can be gain

If Unit 1 use myst , Unit 2 use myst, then followed by Yagura myst

>Unit 1 (No Debuff) = Gain Immunity 2 Rounds Buff

>Unit 2 (No Debuff) = Gain Immunity 2 Rounds Buff

>Unit 3 [Yagura] (No Debuff) = Gain Immunity 2 Rounds Buff

>Unit 4[Clone] (No Debuff) = Gain Immunity 2 Rounds Buff

>Unit 5 (Discouragement) = Because discouragement, no buff can be gain

Hope you understand~

If your talking about why we can have immunity 2 rounds, its been there for long time. Don't think its a bug but maybe is intended to at least help players to clear the level. Not guaranteed to clear even if you copy to get the buffs thou. Especially in Wind NT, need some strategy if your using yagura copy way. Also, not sure you noticed but other elements have same mechanics, Earth and Fire NT have someone who gives immunity too.

NT rankings nowadays wants you to use all same counter element to get maximum pts. So using Yagura to copy at other element stages is not optimal but at least helps you get some pts. This mode have been here for a long time, just this time the mobs changed. Old ones also have someone who gives immunity and nothing done to fix there (if it's a bug).

Not sure about CN but Yagura copying is still doing what he does, copy opponents and get their passives. Working normal as it should.

friend if you are realizing that I am referring to the Nature Training of wind style

If I don't talk about the earth style or the fire style it is because obviously the error is not in those (also obviously everyone knows that Yagura has that quality of allowing immunity for two rounds) that is precisely why I specify that the error is in the wind type, WIND ELEMENT

but since I see that you need me to explain things to you with apples and pears......

round 1

Yagura uses esoterica to copy a ninja (in this case Orochimaru Akatsuki)

Yagura gains immunity 2 rounds

The other three units do not gain said immunity and therefore die

Second attempt with the same team (and I emphasize, THE SAME TEAM without any kind of change)

round 1

Yagura uses esoterica to copy a ninja (in this case Orochimaru Akatsuki)

Yagura gains immunity for two rounds

The same three units, without any change, with the same attacks, ALSO GET immunity for two rounds

two rounds later, Yagura performs his esoteric on Orochimaru again, this time neither gets immunity for two rounds and therefore they die

and so I can continue counting the various possibilities that cause the same acts in the Nature Training WIND

now to refute your "it's because of Gaara Swimsuit" excuse

round 1

Yagura uses esoteria to copy a ninja (in this case any npc EXCEPT Orochimaru Akatsuki and all jinchurikis that get marked immunity)

Neither Yagura nor the other three units gain immunity for two rounds.

Emphasize that not even copying Azuma, Pain, Baki, Naruto Mecha or Minato will get immunity

now he understands me?