So I was playing against Chaos Lord, and he had a dissipation shield up while I had some mutants (hadn't drawn perm control yet).
Then, I break through the shield when CL still has 13 light left in the quanta pool. The highest attack creature I had was 9, so it wasn't like a 15 attack creature broke the shield and then my other creatures continued attacking.
After the turn ended, CL was without shield and still had 13 light.
Seems like a bug to me
. A minor one, but a bug nonetheless.