Right-clicking the top of a pumpkin with shears turns the face a dark orange. Right-clicking again opens up the carving menu. Carving and confirming the pattern works as intended.

latest.log

What version? do you have sodium? optifine? indium? is moonlight updated?

To reproduce:

NeoForge 47.1.84
hauntedharvest-1.20-3.1.17.jar
moonlight-1.20-2.8.81-forge.jar

not sure i cant replicate. did test with forge not neo. dont think that would make a diff tho