On samsung Galaxy 7 Edge,
Android 7.0
What's up Tharja!
Since you started the report on this, I'm gonna use your thread to dwelve on this issue a little further, so we don't get 2 threads on the same topic, ok?
Testing on this, me and a couple other players from the discord chat have found that this bug is not fighter related, but affects both all Gold and Silver fighters as far as we could tell (I couldn't make it happen on bronzes for some reason).
While it can be triggered at random, some specific triggers can be pinpointed, like starting a 2vs1 / 2vs2 / 2vs3 match on story mode or daily event. If both your fighters have full energy in the beginning - and as long as you hit the repeat button at the end of the fight - you can keep fighting the same opponent indefinitely, which can be quite useful to farm Skill Points and Moves from daily events (at least until it gets patched, everyone!
).
It can happen with 3vs1/2/3 as well, but frequently only the first fighter will get infinite energy. Having to hit team select to switch out the worn fighters will cause the energy of the first one to drop to it's real level, thus rendering this exploit useless.
On a different but still related topic, this is not the only consequence of the energy bug: During normal gameplay, we get often surprised with fighters who previously had not a drop of energy left, being displayed with full energy bar in less than 1 minute. While the full bar could be only a visual effect, that said fighter still gets to fight one match before being shown as energy empty again (unless the first part of the bug kicks in, that is).