Plusnet hub one QCA9880 firmware

I'm experiencing router reboots which looks like are related to issues with QCA9880 firmware:

ath10k_pci 0000:02:00.0: wmi command 40859 timeout, restarting hardware
ath10k_pci 0000:02:00.0: failed to send wmi nop: -1
ath10k_pci 0000:02:00.0: failed to send pdev bss chan info request: -143
# opkg list-installed|grep "ath"
ath10k-firmware-qca988x-ct - 2020-07-02-1
kmod-ath - 4.14.215+4.19.161-1-1
kmod-ath10k-ct - 4.14.215+2019-09-09-5e8cd86f-1
kmod-ath9k - 4.14.215+4.19.161-1-1
kmod-ath9k-common - 4.14.215+4.19.161-1-1

After upgrade openwrt to OpenWrt 19.07.6 I still experiencing this issue.

Is there any good firmware for QCA9880 or I should consider turning off 5GHz ?