Hi, I have purchased an Asus RT-AX53U (running Asus 3.0.0.4.382_45213 firmware). And I can reproduce the problem in my own network now. Now I have tested a TP-Link TL-WN722N wifi module. The problem is the same here too. In my setup the rxht mode works with rxmcs 19 and rxmcs 17... all other values seem not to work... urb_len 1564 pkt_cnt 136 pkt_len 1508 drvinfo_sz 32 desc_shift 0 rxmcs 19 rxht 1 paggr 1 faggr 1 urb_len 1560 pkt_cnt 136 pkt_len 1504 drvinfo_sz 32 desc_shift 0 rxmcs 18 rxht 1 paggr 1 faggr 1 urb_len 1560 pkt_cnt 136 pkt_len 1504 drvinfo_sz 32 desc_shift 0 rxmcs 18 rxht 1 paggr 1 faggr 1 urb_len 1560 pkt_cnt 136 pkt_len 1504 drvinfo_sz 32 desc_shift 0 rxmcs 18 rxht 1 paggr 1 faggr 1 urb_len 1564 pkt_cnt 136 pkt_len 1508 drvinfo_sz 32 desc_shift 0 rxmcs 17 rxht 1 paggr 1 faggr 1 urb_len 1564 pkt_cnt 136 pkt_len 1508 drvinfo_sz 32 desc_shift 0 rxmcs 17 rxht 1 paggr 1 faggr 1 urb_len 1560 pkt_cnt 136 pkt_len 1504 drvinfo_sz 32 desc_shift 0 rxmcs 16 rxht 1 paggr 1 faggr 1 urb_len 1560 pkt_cnt 136 pkt_len 1504 drvinfo_sz 32 desc_shift 0 rxmcs 16 rxht 1 paggr 1 faggr 1 urb_len 1560 pkt_cnt 136 pkt_len 1504 drvinfo_sz 32 desc_shift 0 rxmcs 16 rxht 1 paggr 1 faggr 1