@Oktagon_Support please look at all (transforming cards) such as storm The vault this one is just an example they do not flip.
Mox just loses and fizzled no flip
Hi @Julie71
Our team is already investigating all cards with Transform.
Thank you so much for the feedback and for your patience!
I noticed this issue with Crashing Footfalls. It loses 1 shield at the beginning of my turn, but it never transforms (at 4 shields or lower). So it ticks all the way down to 0 then goes to the graveyard 
I also notice it with storm the vault and Azor’s Gateway. Last one keep giving me 10 life every turn condition was trigger but not transform. But today, by some weird reason, it transform fine. I was not able to check storm the vault
They did an update and transforming cards was fixed if I read the update correctly