I have two devices running windows 10 insider build. All of them have different compatible problems with my external hdds.
However, my workaround still usable (as I posted on November 22, 2019 in this thread), so currently it was not a big problem to me.
This bug has been going on for months and MS still has not fixed it.
All it takes is to put back the good uaspstor.sys from build 18362.387 and everything works fine, but MS is not listening to the feedbacks.
It really sucks that it takes so long to fix something they just screwed up with the insider preview builds.
This still fails with build 19551.1005 on Jan 25 2020.
If I copy the file from the current 1909 release it works fine. The problem is there is no way to install the old good driver because it is not signed for the latest insider release, if you replace the file manually it will be restored when running sfc /scannow.
So there is not a clean way to put back the old driver.