These lil buds are Spotted Wing Drosophila larvae and are in berries! Super common in raspberries! The super squishy, juicy ones specifically. If you’re picking and they fall to the ground, leave them, chances are they’re super ripe and those are the ones the fruit flies lay in. Pick the ones that are ripe or almost ripe, you can spread them apart and check to see which ones have it and which don’t to get the texture and look you’re trying to avoid. That’s why it’s important to harvest raspberri