Description:
When I use a VPN (openvpn) connection with NetworkManager, I am unable to run any window application. The coredump flies right away. This looks like a systemd problem? Please find attached logs. I was looking for a similar error, I did not find.

Additional info:
Kernel: x86_64 Linux 5.15.12-arch1-1
systemd 250-4
network-manager-applet 1.24.0-1
networkmanager 1.32.12-2
networkmanager-openvpn 1.8.16-1
networkmanager-qt 5.89.0-1
kdeplasma-addons 5.23.5-1
plasma-desktop 5.23.5-1
plasma-framework 5.89.0-1
plasma-integration 5.23.5-1
plasma-nm 5.23.5-1
plasma-pa 5.23.5-1
plasma-workspace 5.23.5-1

log:

Jan 04 16:09:29 archlinux NetworkManager[589]: <info> [1641308969.9917] vpn-connection[0x55a641184320,12b83421-c239-4200-98bd-d0e59a3ed831,"companyxxxx",4:(tun0)]: VPN connection: (IP Config Get) complete
Jan 04 16:09:29 archlinux NetworkManager[589]: <info> [1641308969.9925] device (tun0): state change: unmanaged -> unavailable (reason 'connection-assumed', sys-iface-state: 'external')
Jan 04 16:09:29 archlinux NetworkManager[589]: <info> [1641308969.9945] device (tun0): state change: unavailable -> disconnected (reason 'connection-assumed', sys-iface-state: 'external')
Jan 04 16:09:29 archlinux NetworkManager[589]: <info> [1641308969.9952] device (tun0): Activation: starting connection 'tun0' (15035cbe-0670-4f74-bc58-063d78f917ed)
Jan 04 16:09:29 archlinux NetworkManager[589]: <info> [1641308969.9953] device (tun0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'external')
Jan 04 16:09:29 archlinux NetworkManager[589]: <info> [1641308969.9956] device (tun0): state change: prepare -> config (reason 'none', sys-iface-state: 'external')
Jan 04 16:09:29 archlinux NetworkManager[589]: <info> [1641308969.9958] device (tun0): state change: config -> ip-config (reason 'none', sys-iface-state: 'external')
Jan 04 16:09:29 archlinux NetworkManager[589]: <info> [1641308969.9959] device (tun0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'external')
Jan 04 16:09:30 archlinux systemd-resolved[579]: tun0: Bus client set default route setting: no
Jan 04 16:09:30 archlinux NetworkManager[589]: <info> [1641308970.0161] device (tun0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'external')
Jan 04 16:09:30 archlinux NetworkManager[589]: <info> [1641308970.0164] device (tun0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'external')
Jan 04 16:09:30 archlinux NetworkManager[589]: <info> [1641308970.0172] device (tun0): Activation: successful, device activated.
Jan 04 16:09:30 archlinux NetworkManager[589]: <info> [1641308970.0319] policy: set-hostname: set hostname to 'xxxxxx.vpn.companyxxxx.local' (from address lookup)
Jan 04 16:09:30 archlinux NetworkManager[589]: <warn> [1641308970.0323] dns-sd-resolved[7435de3f6ed21d4a]: send-updates SetLinkDomains@2 failed: GDBus.Error:org.freedesktop.resolve1.LinkBusy: Link enp8s0 is managed.
Jan 04 16:09:30 xxxxxx.vpn.companyxxxx.local systemd-hostnamed[2401]: Hostname set to <xxxxxx.vpn.companyxxxx.local> (transient)
Jan 04 16:09:30 xxxxxx.vpn.companyxxxx.local systemd-resolved[579]: System hostname changed to 'xxxxxx.vpn.companyxxxx.local'.
Jan 04 16:09:30 xxxxxx.vpn.companyxxxx.local audit[589]: USYS_CONFIG pid=589 uid=0 auid=4294967295 ses=4294967295 msg='op=statistics interface="enp8s0" ifindex=2 args=0 pid=882 uid=1000 result=success exe="/usr/bin/NetworkManager" hostname=? addr=? terminal=? res=success'
Jan 04 16:09:30 xxxxxx.vpn.companyxxxx.local NetworkManager[589]: <info> [1641308970.2860] audit: op="statistics" interface="enp8s0" ifindex=2 args="0" pid=882 uid=1000 result="success"
Jan 04 16:09:30 xxxxxx.vpn.companyxxxx.local kernel: audit: type=1111 audit(1641308970.280:108): pid=589 uid=0 auid=4294967295 ses=4294967295 msg='op=statistics interface="enp8s0" ifindex=2 args=0 pid=882 uid=1000 result=success exe="/usr/bin/NetworkManager" hostname=? addr=? terminal=? res=success'
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local kwin_x11[816]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 57025, resource id: 60817618, major code: 18 (ChangeProperty), minor code: 0
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local systemd[765]: Started Konsole - Terminal.
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local konsole[2435]: qt.qpa.xcb: could not connect to display :0
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local audit[2435]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=2 pid=2435 comm="konsole" exe="/usr/bin/konsole" sig=6 res=1
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local konsole[2435]: qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local konsole[2435]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local kernel: audit: type=1701 audit(1641308972.114:109): auid=1000 uid=1000 gid=1000 ses=2 pid=2435 comm="konsole" exe="/usr/bin/konsole" sig=6 res=1
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local kernel: audit: type=1334 audit(1641308972.120:110): prog-id=35 op=LOAD
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local kernel: audit: type=1334 audit(1641308972.120:111): prog-id=36 op=LOAD
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local kernel: audit: type=1334 audit(1641308972.120:112): prog-id=37 op=LOAD
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local kernel: audit: type=1130 audit(1641308972.120:113): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@1-2436-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local audit: BPF prog-id=35 op=LOAD
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local audit: BPF prog-id=36 op=LOAD
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local audit: BPF prog-id=37 op=LOAD
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@1-2436-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local systemd[1]: Started Process Core Dump (PID 2436/UID 0).
Jan 04 16:09:32 xxxxxx.vpn.companyxxxx.local systemd-coredump[2439]: [LNK] Process 2435 (konsole) of user 1000 dumped core.

Steps to reproduce:
1) Click at network applet, click "Connect" button at desired VPN connection
2) Try to run any window appliaction
3) coredump