Only 2 links appear with x4x4x8 or x8x4x4 bifurcation

[Kondix10]

Component

Dasharo firmware

Device

ASRock Rack SPC741D8-2L2T/BCM

Dasharo version

166a808a265396d4c8f5c327de72539aadce800f

Dasharo Tools Suite version

N/A

Test case ID

N/A

Brief summary

Only 2 links appear with bifurcation set to x4x4x8 or x8x4x4, while there should be 3.

How reproducible

100%

How to reproduce

Set bifurcation to x4x4x8 or x8x4x4 on any PCIe slot
Boot into Ubuntu
Run lspci -tv

Expected behavior

For x4x4x8:

+-[0000:16]-+-00.0  Intel Corporation Ice Lake Memory Map/VT-d
 |           +-00.1  Intel Corporation Ice Lake Mesh 2 PCIe
 |           +-00.2  Intel Corporation Ice Lake RAS
 |           +-00.3  Intel Corporation Device 09a5
 |           +-00.4  Intel Corporation Device 0b23
 |           +-01.0-[17]--
 |           +-03.0-[18]--
 |           \-05.0-[19]--
...

For x8x4x4:

+-[0000:16]-+-00.0  Intel Corporation Ice Lake Memory Map/VT-d
 |           +-00.1  Intel Corporation Ice Lake Mesh 2 PCIe
 |           +-00.2  Intel Corporation Ice Lake RAS
 |           +-00.3  Intel Corporation Device 09a5
 |           +-00.4  Intel Corporation Device 0b23
 |           +-01.0-[17]--
 |           +-05.0-[18]--
 |           \-07.0-[19]--
...

Actual behavior

+-[0000:16]-+-00.0  Intel Corporation Ice Lake Memory Map/VT-d
 |           +-00.1  Intel Corporation Ice Lake Mesh 2 PCIe
 |           +-00.2  Intel Corporation Ice Lake RAS
 |           +-00.3  Intel Corporation Device 09a5
 |           +-00.4  Intel Corporation Device 0b23
 |           +-01.0-[17]--
 |           \-05.0-[18]--
...

Screenshots

No response

Additional context

This issue does not occur on stock firmware. When set to either x4x4x8 or x8x4x4, 3 drives are shown in lspci -tv

Solutions you've tried

No response