Did something happen to Zyra, or... ?

I'm a silver support main & mastery 7 Zyra player in NA. I'm not very good, but I can usually execute her E+W->W+Q->R pretty flawlessly and delete an out-of-position ADC in lategame in a fraction of a second (as you do). I was playing Zyra after the patch today, though, and her Q cast just felt.... super bad for some reason? It was really difficult to execute her combo as the Q just kept sticking and wouldn't cast unless I hit it several times. As a result, I failed to blow up carries on a few occasions and ended up being the one who got picked instead...

Is there anything in the most recent patch that might have affected this? Zyra specifically wasn't mentioned in the patch notes, but I'm pretty sure I wasn't lagging when I tried to hit the combo. Maybe a small lockout time was created on her W? Or my settings just got reset, and I have some kind of automatic cast confirmation that was previously removed? Or maybe it's a bug courtesy of Rito spaghetti code?

Or, most likely, I'm probably just bad and having an off day. I'm really not sure what could have happened!