Unable make a call at this moment

[nesnera]

Moments after ending the call, I wanted to make another call, but got the error message "Unable make a call at this moment". Journad:

• successful call

  Sep 22 08:13:43 plasma-mobile plasmaphonedialer[916]: Starting call...
  Sep 22 08:13:43 plasma-mobile telepathy-ofono[942]: QDBusObjectPath: invalid path ""
  Sep 22 08:13:43 plasma-mobile telepathy-ofono[942]: success  true
  Sep 22 08:13:43 plasma-mobile telepathy-ofono[942]: tp-qt 0.9.8 DEBUG: Creating service::channelAdaptor for  Tp::DBusObject(0x559489c670)
  

• unsuccessful call

  Sep 22 08:24:03 plasma-mobile plasmaphonedialer[916]: Starting call...
  Sep 22 08:24:03 plasma-mobile telepathy-ofono[1423]: QDBusObjectPath: invalid path ""
  Sep 22 08:24:03 plasma-mobile telepathy-ofono[1423]: success  false
  Sep 22 08:24:03 plasma-mobile mission-control[932]: Channel request /org/freedesktop/Telepathy/ChannelDispatcher/Request3 failed, error: Method "Dial" with signature ">
  Sep 22 08:24:03 plasma-mobile plasmaphonedialer[916]: Error when requesting channel "Method \"Dial\" with signature \"ss\" on interface \"org.ofono.VoiceCallManager\" >
  Sep 22 08:24:08 plasma-mobile plasmaphonedialer[916]: file:///usr/lib/qt/qml/org/kde/kirigami.2/Page.qml:448: TypeError: Cannot read property 'globalToolBar' of null
  Sep 22 08:24:08 plasma-mobile plasmaphonedialer[916]: kf.kirigami: Units.devicePixelRatio is deprecated (since 5.86 ): This returns 1 when using Qt HiDPI scaling.
  Sep 22 08:24:08 plasma-mobile plasmaphonedialer[916]: kf.kirigami: Previous message repeats 1 times.
  Sep 22 08:24:09 plasma-mobile plasmaphonedialer[916]: file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/InlineMessage.qml:261:9: QML ActionToolBar: Binding loop dete>
  Sep 22 08:24:09 plasma-mobile plasmaphonedialer[916]: file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/InlineMessage.qml:261:9: QML ActionToolBar: Binding loop dete>
  Sep 22 08:24:15 plasma-mobile plasmashell[888]: qt.qpa.wayland: Wayland does not support QWindow::requestActivate()
  Sep 22 08:24:32 plasma-mobile PackageKit[957]: search-file transaction /7_edcdbaab from uid 0 finished with success after 1431ms
  Sep 22 08:25:05 plasma-mobile eg25manager[1492]: Modem is up for 120 seconds and fully ready
  Sep 22 08:25:05 plasma-mobile eg25manager[1492]: dropping systemd sleep block inhibitor
  

Even if I can't make a call, I can send SMS or connect to the Internet using wwan0.
+ question: How to restore the call function without restarting the mobile? (In case of Internet and SMS problems, restarting eg25-manager, ofonoctl and NetworkManager works for me. However, it doesn't affect calling.)

HW/SW:

• PinePhone v1.2b
• Manjaro/PlaMo (updated 2021-09-21)
• telepathy-ofono 20210417-1
• plasma-dialer 21.08-1