Question about macbook charging

Hi, i tried to test power draw from my charger for my macbook pro [pd up to 65w], before last update when testing on my usb cable it is shown to charge on 65W but after last update it is only drawing 30-35 watt depending if i open application or not sometimes goes to 40 if i running many application all at once . i want to ask is it normal or there is a possibility that my charger is broken

update:

even if it is shown to charge at 30W somehow it still takes the same amount to charge the laptop, and on system report detected charger still output at 65W