Hello, I started the sitting heating for the first time today. I already had some sitting heaters under me but not yet. I had the feeling to sit on a heating blanket on the bottom level. The seat is hardly getting really warm and I have to slide back and forth to get some heat. I then tried out the passenger seat and it remains just as lukewarm. Now I was told in another forum that there are probably problems with the sitting heating in F the year 2021. Is there anything known about this?