Laptop starts with main screen on wrong display and 30s later reorganises to what should be

After the 2023-05-07 stable update, on Pulse 14, Manjaro KDE, the laptop always starts with the main screen on the laptop display and 30s later reorganises to what should be.
My setup consists of the laptop connected to an external screen where I use the external screen as the “main” screen in a side-by-side configuration. This is the arrangement is used all the time for this hardware combo. Before the update, the system would boot with the correct display (my external display) as being the main screen.

Any suggestions for commands I can run to see why this is happening? Thank you