I had the same issue, bought it from local store in my country (not from ALiexpress).
On box I saw 'v2' and picture from shop was with 768KHz, but on WIn10 I did not see that, so I asked seller from ALiexpress (does this DAC come with 768KHz on display and in XMOS driver and I got clearly response - YES), so I called to local store when I bought it and asked them, they told me "trust us, it is second version, we have checked it", but when I explained that device doesn't support 768KHz and 100% it is not real v2 - they without any question propose me return it and make refund.
What I have already done.
Probably, I will never buy again this cheap chinesse devices.
768KHz is just marketing and I do not like sound, connect it to PC, installed drivers, connect to Magni 3 and treble just make me cry, Creative G6 much better in my opinion, even my motherboard audio on Z490 sounds much better than this DAC.
...Where do you think the chips in most DACs are made?
I've used the Sanskrit 3 before... It was audibly transparent. If this DAC is distorting the treble region that much, then either your DAC or something else in your audio chain is broken.