Cho'gath-Viktor bug

If Viktor deploys his Gravity field (E) while your champion is in midair from Cho'gaths Rupture (Q), your champion will stay suspended in mid air and become untargetable until the gravity field dissapates (1.5 seconds). This happened 3 times during my last game (I was playing against Viktor and Cho). I'm not sure if gravity field was affected by "Glorious Evolution" yet but it did start happening after the 15 minute mark so it is completely possible. The first time it happened we where in the middle of a teamfight and it actually saved my life because I was just suspended above the teamfight not taking additional damage.

TL;DR Viktors E and Cho gaths Q keep you floating in the air if used together.