Melons and Pumpkins do not trigger sculk sensors when placed from Melon/Pumpkin plant, despite there being a block placed that would logically cause a vibration in this scenario.
Linked issues
duplicates 1
Comments 2
This is a duplicate of MC-207278, which is about new blocks growing, not being placed.
MC-207276
MC-207278
Are considered invalid, but I agree. A block is being placed therefore it is more similar to this MC-207300 which has a priority assigned.