ReSpeaker 2-Mics Pi HAT with latest Raspbian

I purchased a Respeaker 2-Mics Pi HAT recently.
It works when the installation script (from here ) is executed to revert the OS version but not if using the latest Raspberry Pi kernel (Linux raspberrypi 5.4.51-v7+ #1333 SMP Mon Aug 10 16:45:19 BST 2020 armv7l GNU/Linux).
Unfortunately I need to use the latest kernel for running other software.
I have seen several threads (e.g. https://github.com/respeaker/seeed-voicecard/pull/223) that suggest it is not necessary to revert the kernel but when I try these then the 2-Mic Pi HAT is not recognized.

Please can you advise how to use this card with the latest kernel ?

Thank you very much,
John

Is there anyone at Seeed who knows how to get the Respeaker 2-Mics Pi HAT working with the latest verison of Raspbian ?
Thanks very much,
John