Wi-Fi 7: Why Is AP Responding with 20 MHz CTS After 80 MHz RTS?

Hi Wi-Fi experts,

I’m troubleshooting a case and could use your insights.

Does anyone know what could cause an Access Point (AP) not to follow the expected RTS/CTS behavior?

Here’s the scenario:
A station sends an RTS at 80 MHz bandwidth, so we expect the AP to respond with a CTS also at 80 MHz. However, in my testing, the AP replies with a CTS at only 20 MHz.

The AP is Wi-Fi 7.

Any ideas on what could be causing this behavior?

Thanks in advance!