Wi-Fi Breakdown (Qualcomm Wi-Fi 6E NFA725A) on Lenovo ThinkPad T14s Gen 4 - ath11k_pci errors

[Fourhundred Thecat]

hello,

I'm experiencing a bizarre Wi-Fi issue on Lenovo ThinkPad T14s Gen 4 
(AMD Ryzen 7 PRO 7840U) with a Qualcomm Wi-Fi 6E NFA725A card (using the 
ath11k_pci driver, linux kernel 6.6).

Approximately 50% of the time I boot my laptop, the Wi-Fi connection fails.

     Initial Connection: On affected boots, wlan0 successfully obtains 
an IP address via DHCP and the network works for a few seconds.

     Sudden Breakdown: After a few seconds the network completely 
breaks. I cannot ping anything, and attempting to ifdown wlan0 results 
in long timeouts and numerous errors.

   ath11k_pci 0000:01:00.0: failed to flush transmit queue, data pkts 
pending X
   ath11k_pci 0000:01:00.0: wmi command XXX timeout
   ath11k_pci 0000:01:00.0: HW problem - can not stop rx aggregation
   ath11k_pci 0000:01:00.0: failed to send WMI_VDEV_INSTALL_KEY cmd

     Later, trying to bring the interface back up fails with Could not 
set interface wlan0 flags (UP): Resource temporarily unavailable.

Crucial Datapoint:
If the Wi-Fi works correctly after booting (i.e., this problem does not 
occur in the first 20 seconds after boot), it will continue to work 
flawlessly for hours (perhaps days). I can do as many ifdown wlan0 ; 
ifup wlan0 as I want and I will not trigger the issue.

I am using custom linux kernel 6.6.15, and here are the firmware files:

e12b23ddc4b8d2d2a10a651a5d6fdcd00f60fcae884d2cf5dad17627211fcdfd 
ath11k/WCN6855/hw2.1/amss.bin
759a2bcb3249b39c1e9a595f2559e228a1a682786c15cd1643af4a1352eb24ec 
ath11k/WCN6855/hw2.1/board-2.bin
0c590881870d0e6e98fc7d393ce05690e09287933b1b535e935bf5d98b77713f 
ath11k/WCN6855/hw2.1/m3.bin
e1b774b1feda4cab01f5a26089124059539fc31544ac34129dce45c8ff26d645 
ath11k/WCN6855/hw2.1/regdb.bin
d67150c8925a98a4783c2c9a3e652b5a21fcdf8119875e1d2860c7c180fa98f8 
regulatory.db
704ba48e3b12a28d3ed9411e526f127870201ba5007ee0c17ae92dafe2444fa5 
regulatory.db.p7s