SUMMARY
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On login, the background image from the current theme is missing, presenting a black screen instead. And I can't right click the background to bring up the context menu. This happens if I'm using an external monitor with my laptop monitor disabled. If I set the monitors to mirror each other, I start with a black screen, but the right click works, and after right clicking, I see the background image.

STEPS TO REPRODUCE
1. Use the default theme that comes with Manjaro Pahvo
2. Use an external monitor with a laptop, with the laptop screen disabled
3. Login
4. Right click on background

OBSERVED RESULT

Nothing happens upon right click of the desktop background, and the background doesn't show any images from the selected theme.

EXPECTED RESULT

A right click would bring up a context menu.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Manjaro
(available in About System)
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3

ADDITIONAL INFORMATION

My hardware is a Core i5-8265U CPU, with 7.6 GiB of RAM, and Mesa Intel UHD Graphics 620
Graphics Platform is X11

I suspect that the following logs are related to the issue:

May 10 21:31:13 matt-aspirea51554 plasmashell[778]: trying to show an empty dialog
May 10 21:31:13 matt-aspirea51554 plasmashell[778]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:118:19: QML Loader: Binding loop detected for property "height"
May 10 21:31:13 matt-aspirea51554 plasmashell[778]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:118:19: QML Loader: Binding loop detected for property "height"
May 10 21:31:13 matt-aspirea51554 plasmashell[778]: qml: PlasmaExtras.ScrollArea is deprecated. Use PlasmaComponents3.ScrollView instead.
May 10 21:31:13 matt-aspirea51554 plasmashell[778]: trying to show an empty dialog
May 10 21:31:13 matt-aspirea51554 plasmashell[778]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:118:19: QML Loader: Binding loop detected for property "height"
May 10 21:31:13 matt-aspirea51554 plasmashell[778]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:118:19: QML Loader: Binding loop detected for property "height"
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1
May 10 21:31:14 matt-aspirea51554 plasmashell[778]: requesting unexisting screen 1