Thank you for your feed back but you are missing the point... I am sending 2 different Champions to 2 different undead...
1st Champion...

2nd Champion...

They are attacking 2 different undead and this is what I am seeing...

The green arrow indicates that each Champion is on its way to attack a different undead...

When the 1st Champion attacks the undead.. the green arrow indicates it is on its way back home while the 2nd Champion is still on its way to attack the DIFFERENT undead... you can see that the 1st Champion has increased to level 5 from his attack, while the 2nd Champion is still on its way to attack and is at level 3

The issue is when the 2nd Champion lands its attack on the DIFFERENT undead...
there is no report generated, there are no points given for Champion XP to level up the 2nd Champion (still at level 3), and now the Champion is instantly back like I had never sent it in the first place, and I am out the 10 Energy that I used to send it in the first place...
And you can see the green arrow is indicating that the 1st Champion is still on its way back from its attack on the undead while there is no green arrow on the 2nd Champion, it is instantly back...

SNOWGOON... I appreciate your statement... I hope I have clarified it better now that I am showing you that I am NOT attacking the same undead.
Juglar Del Viento... there is no XP earned on the 2nd Champion. It is like I send the Champion to attack a DIFFERENT undead and when it hits I get nothing, but I loose the 10 Energy I used to send it.
Now I am sending one Champion to attack at a time... this process takes a very long time to level up each one of my Champions
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BELOW IS A BETTER BREAKDOWN OF USING MULTIPLE CHAMPIONS FOR MULTIPLE DIFFERENT ATTACKS.......
Example.... If I have 6 DIFFERENT Champions and I send them all out to attack 6 DIFFERENT undead at the same time and I have 100 Energy to start...

look at the left 2 Champions in each row (they are both LEVEL 1)... 1ST and 4TH Champions....

And you see that all 6 are on their way to attack indicated by the green arrows above and the attack icon in the bottom left of the screen below...

And you see that I have spent 60 Energy (10 Energy for each one) to send them...

When the 1st Champion hits in the top row ( the first one to the left in the top row ) the other 2 Champions instantly come back when they hit and I lose 20 Energy for the 2nd and 3rd Champions in the top row and they earn no XP even though they were sent to attack a DIFFERENT undead...
When the 4th Champion hits in the bottom row ( the first one to the left in the bottom row ) the other 2 Champions instantly come come back when they hit and I lose 20 Energy for the 5th and 6th Champion in the bottom row and they earn no XP even though they were sent to attack a DIFFERENT undead...
Now below... you can see that only the 1st Champion in each row is indicated by a green arrow that it is on its way back and only these 2 Champions have earned any XP and have leveled up to LEVEL 2...

And I have only received 2 reports... showing the hits are 1min apart and show that I attacked 2 DIFFERENT undead and only the 1st and 4th Champions out of the 6 Champions I sent... have leveled up to LEVEL 2...

I should be rewarded for 6 DIFFERENT attacks and not lose 40 Energy because only the 1st & 4th Champions sent get any XP and the other 4 when they hit they get nothing.
Just like other parts of this game I should be able to send out multiple raids, battlegrounds, spies and caravans at the same time... so, I should be able to send multiple Champions at the same time and not lose any Energy and gain XP for all 6 Champions.
I hope this clarifies the BUG issue I am seeing. Have the Developers run multiple Champion raids to DIFFERENT undead a the same time and they will experience the same results.
Please reimburse my account for ( 1000 Emeralds ) now that I have had to use even more to show these examples of this BUG.