- git master everything
- Primary screen is 14" 4k 200% scaling
- Secondary is 27" 1080p 100%, connected via HDMI
- Secondary is positioned to the left of the primary
STEPS TO REPRODUCE
1. Disable the secondary and click "Apply"
2. Re-enable the secondary and click "Apply"
Secondary screen is mirroring the primary
Secondary screen is returned to its former position before disabling it, and remains in extended mode
Fixed by Ivan Tkachenko with https://invent.kde.org/plasma/kscreen/-/commit/c3206f7c4be30927c2a35e9dba2ce59fe05134fa in Plasma 5.27!