The previously reported and fixed problem of being unable to view portions of the MKL documentation -- parts inside boxes, such as descriptions of routine arguments -- is back again.
See this thread from early August 2020:
This is an example of a documentation page with the problem:
Scroll down to the box following "computing the vector product between a sparse matrix and a dense vector".
Ruqiu_C wrote: "...it works well in my Chrome as usual"
Well, that is again different from what I see in Chrome 85.0.4183.83 64 bit on Windows 10. I have the same problem (not seeing documentation content inside boxes) on Chrome, Edge and Opera (all on Windows 10) as well as on my Chromebook.