I had the Fire 4 problem too (on PC though, not PS4).

Another problem, not sure if it's cause by the same reason though, is that if I use Transpose immideately after Flare, it doesn't work anymore since yesterday's patch. I get the "no effect" message as if I had no stacks of Fire/Ice (despite having max Astral Fire stacks thanks to Flare), keep all my Astral Fire stacks and therefore don't have any MP to do anything for the next 15+ seconds and no way to get out of it but to stand there, staring at the mobs and feeling really bad for not contributing.
I thought it might be caused by the same problem, because it also happens when I use skills in quick succession just like with Fire 4?

Also, both problems are solved by just waiting for a bit to let the buffs settle in before using the next skill (so waiting for ~half a second) but waiting half a second every time sums up over the entire fight and we loose a lot of dps because of it, so I really hope it gets some kind of fix soon