When playing Azir on PBE and EUNE I experienced this bug.
If I summon soldier while standing, activate Q, then E I would dash immediately to that soldier.
But If I did that combo while moving E wouldn't activate at all until I stop. I tested this, and if I kept going past my soldier, he would eventually disappear and couldn't activate E to dash to him.
Also there is a bug with Q while moving, sometimes soldier wont go over the wall. Again, Q works fine while I am standing still, but if I cast it while I am moving soldier collides with the terrain.