It happens, don't know how but it happens, and I think what the actual hell.
I know but it only happens if the Tanya player isn't tight with her pressure and mixing up her pressure with two rekkas, one rekka into ex rekka, etc. Her options are ridiculous. And to really punish her negative stuff is pretty much a read instead of reaction. Because once you see she only does one rekka, or two, or an ex third rekka and react to that your frames are gone and have to eat another string. You can react and use d3 (sometimes) unless she delays the ex delayed third rekka.
And of course there's always her option select ex rekka into a second rekka...two hits of armor, multiple extremely fast hits blowing up any armor attempt you may make AND -4 on block. That move alone is probably the dumbest thing in the game.
Not to mention her insane meter building while doing this pressure. She will ALWAYS have at least one if not always two bars.