first of all thank you @anon45274024. It seems that the trouble was entropy, after upgrade from web interface with the option "keep settings" all is working. But the web interface is extremely slowly (any ideas?).
For the rest, I can see this in dmesg:
[ 11.554083] F2FS-fs (mmcblk0p1): Magic Mismatch, valid(0xf2f52010) - read(0x0)
[ 11.561326] F2FS-fs (mmcblk0p1): Can't find valid F2FS filesystem in 1th superblock
[ 11.569220] F2FS-fs (mmcblk0p1): Magic Mismatch, valid(0xf2f52010) - read(0x0)
[ 11.576506] F2FS-fs (mmcblk0p1): Can't find valid F2FS filesystem in 2th superblock
[ 11.584265] F2FS-fs (mmcblk0p1): Magic Mismatch, valid(0xf2f52010) - read(0x0)
[ 11.591503] F2FS-fs (mmcblk0p1): Can't find valid F2FS filesystem in 1th superblock
[ 11.599185] F2FS-fs (mmcblk0p1): Magic Mismatch, valid(0xf2f52010) - read(0x0)
[ 11.606436] F2FS-fs (mmcblk0p1): Can't find valid F2FS filesystem in 2th superblock
And this:
[ 13.096862] ath10k 4.19 driver, optimized for CT firmware, probing pci device: 0x3c.
[ 13.105165] pci 0000:00:02.0: enabling device (0140 -> 0142)
[ 13.111080] ath10k_pci 0000:02:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
[ 13.344913] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/fwcfg-pci-0000:02:00.0.txt failed with error -2
[ 13.355506] ath10k_pci 0000:02:00.0: Falling back to user helper
[ 13.461310] firmware ath10k!fwcfg-pci-0000:02:00.0.txt: firmware_loading_store: map pages failed
[ 13.470261] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/pre-cal-pci-0000:02:00.0.bin failed with error -2
[ 13.481004] ath10k_pci 0000:02:00.0: Falling back to user helper
[ 13.491541] firmware ath10k!pre-cal-pci-0000:02:00.0.bin: firmware_loading_store: map pages failed
[ 13.500701] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/cal-pci-0000:02:00.0.bin failed with error -2
[ 13.511092] ath10k_pci 0000:02:00.0: Falling back to user helper
[ 13.521282] firmware ath10k!cal-pci-0000:02:00.0.bin: firmware_loading_store: map pages failed
[ 13.530080] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/QCA988X/hw2.0/ct-firmware-5.bin failed with error -2
[ 13.541075] ath10k_pci 0000:02:00.0: Falling back to user helper
[ 13.551216] firmware ath10k!QCA988X!hw2.0!ct-firmware-5.bin: firmware_loading_store: map pages failed
[ 13.560560] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/QCA988X/hw2.0/ct-firmware-2.bin failed with error -2
[ 13.571555] ath10k_pci 0000:02:00.0: Falling back to user helper
[ 13.581677] firmware ath10k!QCA988X!hw2.0!ct-firmware-2.bin: firmware_loading_store: map pages failed
[ 13.591035] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/QCA988X/hw2.0/firmware-6.bin failed with error -2
[ 13.601769] ath10k_pci 0000:02:00.0: Falling back to user helper
[ 13.611906] firmware ath10k!QCA988X!hw2.0!firmware-6.bin: firmware_loading_store: map pages failed
[ 13.620998] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/QCA988X/hw2.0/firmware-5.bin failed with error -2
[ 13.631732] ath10k_pci 0000:02:00.0: Falling back to user helper
[ 13.641826] firmware ath10k!QCA988X!hw2.0!firmware-5.bin: firmware_loading_store: map pages failed
[ 13.650921] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/QCA988X/hw2.0/firmware-4.bin failed with error -2
[ 13.661654] ath10k_pci 0000:02:00.0: Falling back to user helper
[ 13.671748] firmware ath10k!QCA988X!hw2.0!firmware-4.bin: firmware_loading_store: map pages failed
[ 13.680839] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/QCA988X/hw2.0/firmware-3.bin failed with error -2
[ 13.691572] ath10k_pci 0000:02:00.0: Falling back to user helper
[ 13.701700] firmware ath10k!QCA988X!hw2.0!firmware-3.bin: firmware_loading_store: map pages failed
[ 13.711513] ath10k_pci 0000:02:00.0: qca988x hw2.0 target 0x4100016c chip_id 0x043202ff sub 0000:0000
[ 13.720776] ath10k_pci 0000:02:00.0: kconfig debug 0 debugfs 1 tracing 0 dfs 1 testmode 0
[ 13.730122] ath10k_pci 0000:02:00.0: firmware ver 10.1-ct-8x-__fW-022-b0e1b7cd api 2 features wmi-10.x,has-wmi-mgmt-tx,mfp,txstatus-noack,wmi-10.x-CT,ratemask-CT,txrate-CT,get-temp-CT,tx-rc-CT,cust-stats-CT,retry-gt2-CT,txrate2-CT,beacon-cb-CT,wmi-block-ack-CT crc32 1e527180
[ 13.782144] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/QCA988X/hw2.0/board-2.bin failed with error -2
[ 13.792618] ath10k_pci 0000:02:00.0: Falling back to user helper
[ 13.803001] firmware ath10k!QCA988X!hw2.0!board-2.bin: firmware_loading_store: map pages failed
[ 13.815202] ath10k_pci 0000:02:00.0: board_file api 1 bmi_id N/A crc32 bebc7c08
[ 14.729472] ath10k_pci 0000:02:00.0: 10.1 wmi init: vdevs: 16 peers: 127 tid: 256
[ 14.746600] ath10k_pci 0000:02:00.0: wmi print 'P 128 V 8 T 410'
[ 14.752707] ath10k_pci 0000:02:00.0: wmi print 'msdu-desc: 1424 sw-crypt: 0 ct-sta: 0'
[ 14.760732] ath10k_pci 0000:02:00.0: wmi print 'alloc rem: 20904 iram: 26056'
[ 14.826611] ath10k_pci 0000:02:00.0: htt-ver 2.1 wmi-op 2 htt-op 2 cal otp max-sta 128 raw 0 hwcrypto 1
[ 14.839121] ath10k_pci 0000:02:00.0: NOTE: Firmware DBGLOG output disabled in debug_mask: 0x10000000
And in the logread:
Sun Jan 12 20:48:01 2020 user.notice SQM: Starting SQM script: piece_of_cake.qos on eth2, in: 95000 Kbps, out: 95000 Kbps
Sun Jan 12 20:48:01 2020 user.notice SQM: Using generic sqm_start_default function.
Sun Jan 12 20:48:02 2020 user.notice SQM: ERROR: cmd_wrapper: ip: FAILURE (2): /sbin/ip link add name ifb4eth2 type ifb
Sun Jan 12 20:48:02 2020 user.notice SQM: ERROR: cmd_wrapper: ip: LAST ERROR: ip: RTNETLINK answers: File exists
Sun Jan 12 20:48:02 2020 user.notice SQM: piece_of_cake.qos was started on eth2 successfully
But as I say all seems to work. The VLAN troubles continue, I need investigate more about wpa3 and iPhone. And probably I will need open another thread about bird2.