I had some weird things with D. Va's ultimate the other night, pretty much ever since they patched her. She is a way better tank and her ultimate is more of a loose cannon now, but I've also had the ultimate somehow not affect me despite being within range, I've seen it outright disappear the moment it exploded with nary a kill to be had, and I've seen it blast through objects a little too effectively.
I think they may have broken a couple of small ultimate related things.