Description of problem:
Noticed the network was intermittently hanging up - I'm on wired too, 
but it appears that whatever was happening in the background with the wireless may have triggered this.

Additional info:
reporter:       libreport-2.9.5
WARNING: CPU: 4 PID: 8909 at net/mac80211/sta_info.c:1002 __sta_info_destroy_part2+0x140/0x150 [mac80211]
Modules linked in: fuse rfcomm ccm thunderbolt nvmem_core xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack devlink ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 arc4 nf_nat nf_conntrack libcrc32c iptable_mangle iptable_raw iptable_security ebtable_filter ebtables ip6table_filter ip6_tables cmac bnep sunrpc snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic dell_rbtn mei_wdt iTCO_wdt iTCO_vendor_support hid_multitouch intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel ath10k_pci
 ath10k_core dell_laptop kvm snd_hda_intel dell_smm_hwmon snd_hda_codec mac80211 snd_hda_core snd_hwdep snd_seq snd_seq_device btusb irqbypass intel_cstate btrtl btbcm intel_uncore btintel ath uvcvideo intel_rapl_perf snd_pcm bluetooth videobuf2_vmalloc videobuf2_memops dell_wmi cfg80211 videobuf2_v4l2 dell_smbios tpm_crb dcdbas videobuf2_common snd_timer rtsx_pci_ms wmi_bmof dell_wmi_descriptor snd intel_wmi_thunderbolt videodev memstick i2c_i801 soundcore joydev idma64 ecdh_generic media rfkill mei_me intel_lpss_pci processor_thermal_device mei intel_soc_dts_iosf ie31200_edac shpchp intel_lpss intel_pch_thermal tpm_tis tpm_tis_core intel_hid dell_smo8800 sparse_keymap tpm int3403_thermal int340x_thermal_zone acpi_pad int3400_thermal acpi_thermal_rel binfmt_misc dm_crypt i915 nouveau
 rtsx_pci_sdmmc mmc_core ttm i2c_algo_bit mxm_wmi drm_kms_helper nvme asix crct10dif_pclmul crc32_pclmul crc32c_intel usbnet drm rtsx_pci nvme_core mii ghash_clmulni_intel serio_raw i2c_hid wmi video
CPU: 4 PID: 8909 Comm: kworker/u16:1 Not tainted 4.16.14-300.fc28.x86_64 #1
Hardware name: Dell Inc. Precision 5520/06X96V, BIOS 1.9.4 04/23/2018
Workqueue: phy0 ieee80211_iface_work [mac80211]
RIP: 0010:__sta_info_destroy_part2+0x140/0x150 [mac80211]
RSP: 0018:ffffae81d1517ca0 EFLAGS: 00210286
RAX: 00000000fffffff5 RBX: ffff9ed786032000 RCX: 0000000000000000
RDX: ffff9ed781083f00 RSI: 00000000fffffe01 RDI: 0000000000000000
RBP: ffff9ed797a70760 R08: ffff9ed773572400 R09: 0000000000000001
R10: ffffd386a0c19600 R11: 0000000000000000 R12: ffff9ed7910388c0
R13: 0000000000000000 R14: ffff9ed797a70cb0 R15: ffff9ed797a70cb0
FS:  0000000000000000(0000) GS:ffff9ed7be500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000058d7b000 CR3: 000000065b20a004 CR4: 00000000003606e0
DR0: 00000001401514e0 DR1: 0000000140123580 DR2: 0000000140142f30
DR3: 0000000140143200 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __sta_info_flush+0x151/0x1b0 [mac80211]
 ieee80211_set_disassoc+0xb8/0x3b0 [mac80211]
 ieee80211_sta_connection_lost.constprop.24+0x36/0x70 [mac80211]
 ieee80211_sta_work+0x246/0x5e0 [mac80211]
 ? __switch_to_asm+0x40/0x70
 ? __switch_to_asm+0x34/0x70
 ? __switch_to_asm+0x40/0x70
 ? __switch_to_asm+0x34/0x70
 ? __switch_to_asm+0x40/0x70
 ? __switch_to_asm+0x34/0x70
 ? __switch_to_asm+0x40/0x70
 ? __switch_to_asm+0x34/0x70
 ? __switch_to_asm+0x40/0x70
 ? __switch_to_asm+0x34/0x70
 ? __switch_to_asm+0x40/0x70
 ? __switch_to_asm+0x34/0x70
 ? __switch_to+0xa3/0x4b0
 ? __switch_to_asm+0x34/0x70
 ? skb_dequeue+0x52/0x60
 ? process_one_work+0x187/0x340
 process_one_work+0x187/0x340
 worker_thread+0x2e/0x380
 ? pwq_unbound_release_workfn+0xd0/0xd0
 kthread+0x112/0x130
 ? kthread_create_worker_on_cpu+0x70/0x70
 ret_from_fork+0x35/0x40
Code: 80 bb 0c 01 00 00 00 0f 84 52 ff ff ff 45 31 c0 b9 01 00 00 00 48 89 da 4c 89 e6 48 89 ef e8 a8 ae ff ff 85 c0 0f 84 34 ff ff ff <0f> 0b e9 2d ff ff ff 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00