In which control scheme? If you were using the motion controls, you might have pressed ZL and ZR by mistake (the L and R buttons are kind of small). If you were using the traditional controls, your rush gauge probably wasn't full yet. If you were using the single joy-con controls, the L, ZL, R, and ZR buttons are not mapped to anything; you might be confusing them with SL and SR, which activate rush, and as I said before, it might be due to your rush gauge not being full yet. Hope this helps!
In which control scheme? If you were using the motion controls, you might have pressed ZL and ZR by mistake (the L and R buttons are kind of small). If you were using the traditional controls, your rush gauge probably wasn't full yet. If you were using the single joy-con controls, the L, ZL, R, and ZR buttons are not mapped to anything; you might be confusing them with SL and SR, which activate rush, and as I said before, it might be due to your rush gauge not being full yet. Hope this helps!