For about 6 months or so after I first started making cum this would happen intermittently. It all depends on how often you masturbate, or have sex. Now I consistently have sperm every time I orgasm, but the amount varies.

About 2 years now, I started when I was 13.5.

I had them for a little more than 8 months after my first ejaculation. It happened less and less often. Now, I don't seem to have them anymore at all.

It has never happenned to me but:

1. One day when I masturbated five times in the same day there was very little cum by the last time. At that point I didn't feel like doing it again but, if I had, I suspect that would have been completely dry.
   
2. The amount of cum I produce has definitely increased since I started from just a tiny bit to a decent amount.
   

So it makes sense that, if you've recently started to be able to ejaculate and consequently are still making it quite slowly, and you masturbate again soon after the last time, that it could be dry. So I think it is quite normal and nothing to worry about.

I remember it happening every now and then around the ages of 13-14. I would say that is completely normal and will likely happen less as you get older. If it happens at my age now, then I probably did something wrong

For several months I mixed in dry and wet, but only if I was masturbating more than twice a day, otherwise they were all wet.

I stopped cumming dry at age 12 and make spark
All the time now. Once I jerked off 6x in a day and there was hardly anything left by the last time - I was just shooting a little thin, watery fluid from my penis! It’s like I drained my balls completely of all the cum. Lol.

Honestly the only time i get dry orgasms is when i jerk off like a shit-ton and i have no cum left

But then again, im older... and since you're still new to cumming, you're probably fine.