Same problem... Even though everything is up-to-date.
At lower battery levels, everything feels sluggish even when the performance slider is turned to 'best performance'.
This otherwise very capable Surface Pro 7 i5/8G turns into a laggy messs where the CPU will max at 1GHz at normal temperatures. it even stutters heavily when scrolling webpages like youtube.
This problem dates from December and it still isn't fixed? This is truly unacceptable...
We should somehow get this problem to their attention.