I wanted to confirm that I was suffering of this bug, but reverting to the -7 (22.1.7.0) firmware solved the issue for me on AC 7260.
When I was experiencing the problem the firmware in use was 22.24.8.0, and my dmesg reported what reported in message #8 above. Turning off power save did not make any difference.
My AP is a Netgear DGN 3500 on channel 11, 2.4 GHz, configured with "Up to 300 Mbps" mode, so 802.11n.
I wanted to confirm that I was suffering of this bug, but reverting to the -7 (22.1.7.0) firmware solved the issue for me on AC 7260.
When I was experiencing the problem the firmware in use was 22.24.8.0, and my dmesg reported what reported in message #8 above. Turning off power save did not make any difference.
My AP is a Netgear DGN 3500 on channel 11, 2.4 GHz, configured with "Up to 300 Mbps" mode, so 802.11n.