Xiaomi AX3600 - openwrt snapshot -> wifi crash every couple hours

Hey guys,

i got a AX3600 and flashed openwrt this weekend (exactly exactly according to instructions). So far im very happy but after some hours my wifi crash randomly. (5 times now since yesterday evening) After a router reboot everything works well again. Restarting the radios does not have any effect.

Logs say:

Sun Sep 17 22:03:47 2023 kern.warn kernel: [95347.443924] ath11k_warn: 110 callbacks suppressed
Sun Sep 17 22:03:47 2023 kern.warn kernel: [95347.443949] ath11k c000000.wifi: failed to send WMI_PDEV_BSS_CHAN_INFO_REQUEST cmd
Sun Sep 17 22:03:47 2023 kern.warn kernel: [95347.447641] ath11k c000000.wifi: failed to send pdev bss chan info request
Sun Sep 17 22:03:47 2023 kern.warn kernel: [95347.455382] ath11k c000000.wifi: failed to send WMI_PDEV_SET_PARAM cmd
Sun Sep 17 22:03:47 2023 kern.warn kernel: [95347.461979] ath11k c000000.wifi: Failed to set beacon mode for VDEV: 0
Sun Sep 17 22:03:47 2023 kern.warn kernel: [95347.468489] ath11k c000000.wifi: failed to send WMI_BCN_TMPL_CMDID
Sun Sep 17 22:03:47 2023 kern.warn kernel: [95347.474994] ath11k c000000.wifi: failed to submit beacon template command: -108
Sun Sep 17 22:03:47 2023 kern.warn kernel: [95347.481158] ath11k c000000.wifi: failed to update bcn template: -108
Sun Sep 17 22:03:47 2023 kern.warn kernel: [95347.488353] ath11k c000000.wifi: failed to send WMI_VDEV_SET_PARAM_CMDID
Sun Sep 17 22:03:47 2023 kern.warn kernel: [95347.494961] ath11k c000000.wifi: failed to set BA BUFFER SIZE 256 for vdev: 0
Sun Sep 17 22:03:47 2023 kern.warn kernel: [95347.501647] ath11k c000000.wifi: failed to send WMI_VDEV_SET_PARAM_CMDID
Sun Sep 17 22:03:49 2023 daemon.err uhttpd[1927]: [info] luci: accepted login on / for root from 192.168.1.105
Sun Sep 17 22:03:53 2023 kern.warn kernel: [95353.514397] ath11k_warn: 490 callbacks suppressed
Sun Sep 17 22:03:53 2023 kern.warn kernel: [95353.514420] ath11k c000000.wifi: failed to send WMI_PDEV_BSS_CHAN_INFO_REQUEST cmd
Sun Sep 17 22:03:53 2023 kern.warn kernel: [95353.518111] ath11k c000000.wifi: failed to send pdev bss chan info request
Sun Sep 17 22:03:53 2023 kern.warn kernel: [95353.525800] ath11k c000000.wifi: failed to send WMI_PDEV_SET_PARAM cmd
Sun Sep 17 22:03:53 2023 kern.warn kernel: [95353.532446] ath11k c000000.wifi: Failed to set beacon mode for VDEV: 0
Sun Sep 17 22:03:53 2023 kern.warn kernel: [95353.538968] ath11k c000000.wifi: failed to send WMI_BCN_TMPL_CMDID
Sun Sep 17 22:03:53 2023 kern.warn kernel: [95353.545453] ath11k c000000.wifi: failed to submit beacon template command: -108
Sun Sep 17 22:03:53 2023 kern.warn kernel: [95353.551626] ath11k c000000.wifi: failed to update bcn template: -108
Sun Sep 17 22:03:53 2023 kern.warn kernel: [95353.558823] ath11k c000000.wifi: failed to send WMI_VDEV_SET_PARAM_CMDID
Sun Sep 17 22:03:53 2023 kern.warn kernel: [95353.565428] ath11k c000000.wifi: failed to set BA BUFFER SIZE 256 for vdev: 0
Sun Sep 17 22:03:53 2023 kern.warn kernel: [95353.572113] ath11k c000000.wifi: failed to send WMI_VDEV_SET_PARAM_CMDID

The 110 callbacks suppressed... comes every 5-10 sec.
Do you have an idea what i have done wrong or how to fix that problem?

I use 3 ssids per radio (guest, lan, iot) that are bridged on three interfaces. Each with its own cidr.

Best regards

amapetilan