after upgrading my two PC to Windows 10 Enterprise 2004, OS build 19041.450, I'm experiencing on both slow writing on USB 3 key encrypted with bitlocker.

With previous Windows version writing speed was about 20 MB/s, now speed swings from 8 MB/s to 0.

With the same USB key not encrypted the writing speed is about 18 MB/s, a bit slower than with the previous Windows version.

USB 3 chipset is not the same on the PCs, one is Intel and the other is ASmedia.

Any idea on how to fix this issue?

Thanks in advance