On my D3200 I had the same trouble. I eventually discovered the problem could be resolved by holding down the “AE-L/AF-L” button. I then reassigned that button to AF-L mode, which means it only autofocuses while that button is pressed. That eliminates the problem. I happen to like having the focus locked by default, but you can experiment with other settings for this button. I assume this is a bug in the lens or camera firmware but at least there are workarounds.
+
On my D3200 I had the same trouble. I eventually discovered the problem could be resolved by holding down the “AE-L/AF-L” button. I then reassigned that button to AF On mode, which means it only autofocuses while that button is pressed. That eliminates the problem. I happen to like having the focus locked by default, but you can experiment with other settings for this button. I assume this is a bug in the lens or camera firmware but at least there are workarounds.
On my D3200 I had the same trouble. I eventually discovered the problem could be resolved by holding down the “AE-L/AF-L” button. I then reassigned that button to AF-L mode, which means it only autofocuses while that button is pressed. That eliminates the problem. I happen to like having the focus locked by default, but you can experiment with other settings for this button. I assume this is a bug in the lens or camera firmware but at least there are workarounds.