When ancient cities are generated, the camp site structure will be generated as a combined union of all three variants camp_1, camp_2, and camp_3, instead of a single structure from one of the listed variants.

Steps to Reproduce:

Generate a new world, and locate one or more ancient city with camp a site structure(s).

/locate structure minecraft:ancient_city

Expected Results:

Using the /place template command, these are the results of specifying the camp_1, camp_2, and camp_3 structure files, respectively, and are what would be expected to be seen in any Ancient City with one or more camp sites:
   

Observed Results:

Seed -977118593:
X: -353 Y: -40 Z: 1378 (Two identical camp sites of unknown structure):

X: 367 Y: -45 Z: 1327 (This is near the previous screenshot; the other identical campsites in previous image can be seen in the background. This one is also identical and unknown.)

Seed 5305220127415150578:
X: 163 Y: -45 Z: 122

X: 53 Y: -45 Z: 133

X: -306 Y: -45 Z: 542