2016 Prius cutting throttle under heavy load/hard acceleration

Recently, my imported from the US 2016 Prius started having an issue, where under hard acceleration it would cut the throttle, above let's say 40-60 km/h. While holding the pedal down, it would stutter occasionally and halt acceleration almost completely. Releasing the throttle to a position below ~80%, the car will ride without any issues. I don't think it's a hybrid issue because the overall fuel consumption didn't change. I still average 3.0-3.5 l/100km when I'm driving alone, and it only happens at above urban driving speeds when I want to press the pedal all the way down. Accelerating at a slower rate and the car can easily do the highway speeds of 140 km/h.

I've changed the fuel pump assembly from another 2016 Prius with higher mileage(200k miles/330k km), and the air filter to the new one, and all changes were done before the issue appeared. The issue itself appeared after I had replaced all tires with a set of new, better-performing tires. I've tried switching the MAF sensor from another Prius that drives fine, and the issue persisted. The last thing I did was I tanked at a different gas station than usual and put the fuel line cleaner product in.

Just to add in:

• Dr. Prius app shows the cell difference at 0.1V
  
  
• Battery state and temperature do not affect the issue.
  
  
• The Short Fuel Trim spikes momentarily before the throttle cutoff and then dips immediately.
  
  
• The local dealer will most likely refuse to inspect the vehicle since it was imported from the US, and multiple local mechanics took a brief look and could not pinpoint the issue.
  
  
• No Check Engine light present, but a lot of archived OBD codes after every scan.
  
  • One mechanic asked me to keep flooring it after the issue appeared, and after approximately a minute of stuttering, the Christmas tree lit up and the car shut itself down. Restarting the car cleared the Christmas tree and only left a Check Engine Light on with P3190. After clearing the code approximately a month ago, the car has kept driving without the check engine light to this day.
    
• Replaced the spark plugs with original Denso plugs.
  

If anyone has any ideas what could be the cause, I'd be happy to listen.

 

I totally understand it, and it was merely a way to quickly narrow down the list of possible culprits. If changing a MAF sensor from a car that drives fine won't change a thing, and that other car drives fine with the MAF sensor from my car, then it's very unlikely the MAF sensor is the cause of the issue.