same bug happened to me while playing
but what happened was that my 3|2 pegasus was antimattered,then had 3 blessings resulting in a 3|11 pega.then dive made it 6|11.at end of turn,it was 12|11,as if it was never antimattered.
the same pegasus,after another blessing was again antimattered into -15|14 and after the dive was made 15|14 again.
I tested in the trainer,antimattering my own creatures and the effect,for all combinations was as if,the bug did not exist