Async + master/slave mode

[BenGant]

Hello.
I have two BladeRF device which I'm trying to combine in async mode together with master/slave configuration. And looks like it is not possible - I got such error:

[ERROR @ host/libraries/libbladeRF/src/backend/usb/libusb.c:1090] Transfer timed out for buffer 0x564bcaf44740

Do you have any limitations for usage bladeRF in this mode?