Yes if this happen after Francine cast, then Chameleon cast. (Francine effect will be gone)
But if Francine cast again… let see…
1st Chameleoon cast, so allies have element change to blue.
Before Francine Cast (04:01.9)
After Francine Cast (04:17.6)
… now after this step, we need the screenshot if next turn Francine will clear the element or not, or this screen is already in the next turn after Francine cast? if so, then Francine can not cleanse Element change which is should be bugs.
So it should be like this in step by step:
G Chameleoon cast, so All our allies have element change effect aliments ON
Francine mana charged
Francine cast special, set status to cleanse for the next turn
Now in the next turn, it should be cleanse the element change effect