AC blowing warmer air out of drivers vent than the passengers side

[TheCole4]

2016 Ford Fusion Titanium. I appear to be stumped. This problem occurred to me around a week ago. While the AC is on full blast I took temperatures with a thermometer that read that my drivers side air vents were pushing air out at about 10-15 degrees warmer than my passenger side. But when I turned the fan speed down to about the middle, the temperatures go back to being even. Through some searching I thought it would be the blend door actuator, replaced that...nothing. I really don't know what else it could be. I don't think my AC system needs a recharge because the passenger side is blowing cold air out just fine, but I might be wrong. Any help would be well received, it's been over 100 degrees where I live the past week with it just getting hotter.