Game freezes and stops responding when I do /locatebiome dripstone_caves

I was testing out the new snapshot, and as I started to look through the new biomes, I did /locatebiome dripstone_caves

after I did this, my game lagged for a second, and my ticks stopped working. 

I could not type and chat and the tick speed had been stopped. I had to close my game and rejoin to stop it. Please let me know what I can do about this.