During Tank Update - Please fix this longstanding Sion bug

If Sion casts Q while he is attacking a turret, he will 100% every single time repeatably interrupt his next attack mid-swing and stop attacking, just standing there.

This is really, really painful if you are split-pushing as sion because it KILLS your damage when you are trying to use sheen procs to take turrets down faster. Please fix it, I beg of you :(