Rumble ultimate smartcast bug

Hi ! I'd like to report a very annoying bug here: since this morning patch, the rumble ult randomly switches in a strange mode for the whole game: it acts like some sort of a smartcast hybrid (both with smartcast switched on and off), meaning that it can only be landed by pressing twice (pressing once shows the range, as usual), but the start of the line can't be moved from the point where the cursor was when R was first pressed and thus the line will orbitate from around that precise point and it forbids you from launching good ults, because in teamfights you can't take the time needed to take this bug in factor to make a precise ult, so you often end up with a bad ult and a lost teamfight. Please fix this quickly !