HiPad Max: BT Aptx and LDAC NOT OK!

i am using the HiPad Max with newest Software.
When i try to hear Musik using Bluetooth > no problem.
When i activate AptX or LDAC to have better Quality there comes no Sound on my WH-1000XM3 Headset.
Same Test with my POCO X3 Pro > no Problem with AptX and LDAC > perfect Sound !

Please fix HighQuality Bluetooth !
Thank You !