minecraft.custom:minecraft.talked_to_villager doesn't add the score when right-clicking a baby villager

Can confirm in 1.16.5 and 21w07a.

Can confirm in 21w08b. Video attached.

Can confirm in 21w13a.

Can confirm in 21w14a.

Can confirm in 21w16a.

Can confirm in 21w17a.

Can confirm in 1.17.

Can confirm in 1.17.1.

I can confirm this behavior in 1.18 Release Candidate 3.

Here's a code analysis of this issue. The following is based on a decompiled version of Minecraft 1.17.1 using MCP-Reborn. Please note that I'm quite tentative about this analysis, although I'm persuaded to believe that this is likely a cause of the problem. 🙂

Code Analysis (tentative):

net.minecraft.world.entity.npc.Villager.java

public class Villager extends AbstractVillager implements ReputationEventHandler, VillagerDataHolder {
   ...
   public InteractionResult mobInteract(Player $$0, InteractionHand $$1) {
      ItemStack itemstack = $$0.getItemInHand($$1);
      if (!itemstack.is(Items.VILLAGER_SPAWN_EGG) && this.isAlive() && !this.isTrading() && !this.isSleeping()) {
         if (this.isBaby()) {
            this.setUnhappy();
            return InteractionResult.sidedSuccess(this.level.isClientSide);
         } else {
            boolean flag = this.getOffers().isEmpty();
            if ($$1 == InteractionHand.MAIN_HAND) {
               if (flag && !this.level.isClientSide) {
                  this.setUnhappy();
               }

               $$0.awardStat(Stats.TALKED_TO_VILLAGER);
            }

            if (flag) {
               return InteractionResult.sidedSuccess(this.level.isClientSide);
            } else {
               if (!this.level.isClientSide && !this.offers.isEmpty()) {
                  this.startTrading($$0);
               }

               return InteractionResult.sidedSuccess(this.level.isClientSide);
            }
         }
      } else {
         return super.mobInteract($$0, $$1);
      }
   }
   ...

If we look at the above class, we can see that upon talking to an adult villager, minecraft.custom:minecraft.talked_to_villager increases. This is evident through the following line of code:

$$0.awardStat(Stats.TALKED_TO_VILLAGER);

However, upon talking to a baby villager, this line of code isn't present meaning that minecraft.custom:minecraft.talked_to_villager doesn't increase.