I believe that whenever an empowered auto attack is initiated it treats the target as if it were new, because for example; I was playing Shyvana earlier, and unlike other commenters and OP, Q does not exactly "stop" the auto attack. I found that after 2-3 seconds of not doing anything after a Q, Shyvana will again commence auto attacking.
For Reiteration:
- The period immediately after using Q, Shyv's autos stop.
- 2-3 seconds later they recommence as if finding the target for the 1st time.
- This Can be countered by initiating an attack onto the target. (Right-clicking the bugger again)
Thank you for reading, and please fix as soon as possible.
~GungHoFarmer