Yes. For me it's a precursor to a crash.
I've tried every imaginable electrolyte drink, homemade and commercial, and I think they do help a bit, but they're not enough. Weirdly, a bit of refined sugar + electrolytes + caffeine seems to work better. But still not enough. Only thing that really helps is all of the above + total cessation of activity.
So for me it's another warning sign, better heeded than treated.