I have a weighted blanket, but it's not quite the right weight for the person – it's significantly h…

I have a weighted blanket, but it's not quite the right weight for the person – it's significantly heavier. However, the person says they've been sleeping better under it. But there's a catch: after waking up from this deep sleep, the person feels like their legs (from feet to knees) and arms (from shoulders down) have been sweating. This has been happening for 4 days, ever since they started using the weighted blanket... Does this mean the blanket isn't suitable? Or is it an adjustment to the weight? Could it be a vascular crisis and lead to something bad? Does anyone have practical experience? Please share! By the way, the person isn't willing to give up on the idea of "I'm definitely going to sleep under a weighted blanket!". Maybe they need a lighter one? Another question: are lighter blankets considered less hot? Do people sleep under them in the summer?