ROG THETA 7.1 - 7.1 channel can no longer be activated.

[ST-Zero]

Currently this headset is unable to activate the 7.1 channel.
Until recently, there was an item to select 7.1 channels in the red frame in the figure below, but this item is no longer available.
Is anyone else facing the same problem?

The current version is shown in the figure below.

[ST-Zero]

This seems to be a problem with the latest firmware.
I guess I will have to wait until the fixed version is released.