[Stable Update] 2022-03-14 - Kernels, KDE, LibreOffice, Kodi, Qt5, Mozilla, NetworkManager, Pipewire

NetworkManager can’t connect L2TP VPN after the upgrade. Here is a part of output from ‘journalctl -u NetworkManager’.

:
NetworkManager[4912]: xl2tpd[4912]: check_control: Received out of order control packet on tunnel 41413 (got 2, expected 3)
NetworkManager[4912]: xl2tpd[4912]: handle_control: bad control packet!
charon[4878]: 09[IKE] sending keep alive to 93.184.216.34[4500]
NetworkManager[4912]: xl2tpd[4912]: check_control: Received out of order control packet on tunnel 41413 (got 2, expected 3)
NetworkManager[4912]: xl2tpd[4912]: handle_control: bad control packet!
NetworkManager[4912]: xl2tpd[4912]: check_control: Received out of order control packet on tunnel 41413 (got 2, expected 3)
NetworkManager[4912]: xl2tpd[4912]: handle_control: bad control packet!
charon[4878]: 09[IKE] sending keep alive to 93.184.216.34[4500]
NetworkManager[4912]: xl2tpd[4912]: check_control: Received out of order control packet on tunnel 41413 (got 2, expected 3)
NetworkManager[4912]: xl2tpd[4912]: handle_control: bad control packet!
NetworkManager[4912]: xl2tpd[4912]: check_control: Received out of order control packet on tunnel 41413 (got 2, expected 3)
NetworkManager[4912]: xl2tpd[4912]: handle_control: bad control packet!
charon[4878]: 11[IKE] sending keep alive to 93.184.216.34[4500]
NetworkManager[4912]: xl2tpd[4912]: check_control: Received out of order control packet on tunnel 41413 (got 2, expected 3)
NetworkManager[4912]: xl2tpd[4912]: handle_control: bad control packet!
NetworkManager[4912]: xl2tpd[4912]: check_control: Received out of order control packet on tunnel 41413 (got 2, expected 3)
NetworkManager[4912]: xl2tpd[4912]: handle_control: bad control packet!
NetworkManager[4912]: xl2tpd[4912]: check_control: Received out of order control packet on tunnel 41413 (got 2, expected 3)
NetworkManager[4912]: xl2tpd[4912]: handle_control: bad control packet!
NetworkManager[4912]: xl2tpd[4912]: check_control: Received out of order control packet on tunnel 41413 (got 2, expected 3)
NetworkManager[4912]: xl2tpd[4912]: handle_control: bad control packet!
charon[4878]: 01[IKE] sending keep alive to 93.184.216.34[4500]
NetworkManager[4912]: xl2tpd[4912]: check_control: Received out of order control packet on tunnel 41413 (got 2, expected 3)
NetworkManager[4912]: xl2tpd[4912]: handle_control: bad control packet!
NetworkManager[4912]: xl2tpd[4912]: Maximum retries exceeded for tunnel 2102.  Closing.
NetworkManager[4912]: xl2tpd[4912]: Terminating pppd: sending TERM signal to pid 4913
NetworkManager[4912]: xl2tpd[4912]: Connection 41413 closed to 93.184.216.34, port 1701 (Timeout)
:

Once I only downgrade NetworkManager (1.36.2-1 → 1.34.0.1), it works well as before.
I suspect new one fails to communicate with xl2tpd.

thanks.