Like other have already reported I also have WiFi 5GHz issues ending up with:
[145644.885701] ------------[ cut here ]------------
[145644.890433] WARNING: CPU: 0 PID: 0 at net/core/dev.c:5615 net_rx_action+0x170/0x2fc
[145644.898216] Modules linked in: ath9k(O) ath9k_common(O) qcserial pppoe ppp_async ath9k_hw(O) ath10k_pci(O) ath10k_core(O) ath(O) usb_wwan pppox ppp_generic nf_conntrack_ipv6 mac80211(O) iptable_nat ipt_REJECT ipt_MASQUERADE ebtable_nat ebtable_filter ebtable_broute cfg80211(O) at24 xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_helper xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_HL xt_FLOWOFFLOAD xt_DSCP xt_CT xt_CLASSIFY usbserial ums_usbat ums_sddr55 ums_sddr09 ums_karma ums_jumpshot ums_isd200 ums_freecom ums_datafab ums_cypress ums_alauda slhc sch_cake(O) nvmem_core nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat_ftp
[145644.969441] nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack_netlink nf_conntrack_ftp nf_conntrack iptable_mangle iptable_filter ipt_ECN ip_tables ebtables ebt_vlan ebt_stp ebt_redirect ebt_pkttype ebt_mark_m ebt_mark ebt_limit ebt_among ebt_802_3 crc_ccitt compat(O) br_netfilter fuse act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_tbf sch_htb sch_hfsc sch_ingress ledtrig_oneshot ledtrig_heartbeat ledtrig_gpio cryptodev(O) xt_set ip_set_list_set ip_set_hash_netiface ip_set_hash_netport ip_set_hash_netnet ip_set_hash_net ip_set_hash_netportnet ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip
[145645.040913] ip_set nfnetlink ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables nfsd msdos ifb sit ip6_tunnel tunnel6 tunnel4 ip_tunnel rpcsec_gss_krb5 tun snd_compress snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_rawmidi snd_seq_device snd_hwdep snd soundcore ntfs hfsplus hfs cifs autofs4 dm_crypt dm_mirror dm_region_hash dm_log dm_mod dax multipath raid456 async_raid6_recov async_pq async_xor async_memcpy async_tx raid10 raid1 raid0 linear md_mod nls_utf8 nls_koi8_r nls_cp1255 nls_iso8859_6 nls_iso8859_2 nls_iso8859_15 nls_iso8859_13 nls_cp932 nls_cp866 nls_cp864 nls_cp862 nls_cp852 nls_cp850 nls_cp775 nls_cp1251 nls_cp1250 xts algif_skcipher algif_hash af_alg sha512_generic sha256_generic seqiv jitterentropy_rng drbg pcbc md5 md4 hmac gf128mul
[145645.112409] ecb cts ctr cmac ccm cbc authenc vfat fat nls_iso8859_1 nls_cp437 uas ledtrig_transient ahci xfs libcrc32c exfat(O)
[145645.124120] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G O 4.14.158 #0
[145645.131531] Hardware name: Marvell Armada 380/385 (Device Tree)
[145645.137566] [<c010ed2c>] (unwind_backtrace) from [<c010aa20>] (show_stack+0x10/0x14)
[145645.145417] [<c010aa20>] (show_stack) from [<c0799434>] (dump_stack+0x94/0xa8)
[145645.152744] [<c0799434>] (dump_stack) from [<c0121d9c>] (__warn+0xe4/0x100)
[145645.159809] [<c0121d9c>] (__warn) from [<c0121e68>] (warn_slowpath_null+0x20/0x28)
[145645.167485] [<c0121e68>] (warn_slowpath_null) from [<c067006c>] (net_rx_action+0x170/0x2fc)
[145645.175943] [<c067006c>] (net_rx_action) from [<c0101628>] (__do_softirq+0xe0/0x240)
[145645.183794] [<c0101628>] (__do_softirq) from [<c0126c4c>] (irq_exit+0xd4/0xe4)
[145645.191123] [<c0126c4c>] (irq_exit) from [<c0165208>] (__handle_domain_irq+0x9c/0xac)
[145645.199059] [<c0165208>] (__handle_domain_irq) from [<c0101468>] (gic_handle_irq+0x5c/0x90)
[145645.207517] [<c0101468>] (gic_handle_irq) from [<c010b6cc>] (__irq_svc+0x6c/0x90)
[145645.215102] Exception stack(0xc0b01f58 to 0xc0b01fa0)
[145645.220251] 1f40: 00000000 4b1f7b60
[145645.228534] 1f60: 2ec89000 c01145e0 ffffe000 c0b03c78 c0b03c28 00000000 c0a39a28 414fc091
[145645.236818] 1f80: 00000000 00000000 c0b01fa0 c0b01fa8 c01080e8 c01080ec 60000013 ffffffff
[145645.245102] [<c010b6cc>] (__irq_svc) from [<c01080ec>] (arch_cpu_idle+0x34/0x38)
[145645.252605] [<c01080ec>] (arch_cpu_idle) from [<c015b08c>] (do_idle+0xac/0x11c)
[145645.260019] [<c015b08c>] (do_idle) from [<c015b348>] (cpu_startup_entry+0x18/0x1c)
[145645.267699] [<c015b348>] (cpu_startup_entry) from [<c0a00d64>] (start_kernel+0x49c/0x4a8)
[145645.276013] ---[ end trace 0cad3ee1feb35165 ]---
[145645.281262] ath10k_pci 0000:02:00.0: SWBA overrun on vdev 0, skipped old beacon