SUMMARY
When using an active stylus or touchscreen with multiple displays, the input is fed to both screens.


STEPS TO REPRODUCE
1. Connect at least 1 auxiliary display to a laptop with active stylus support and/or a touchsceen.
2. Use the touchscreen/active stylus on the laptop display

OBSERVED RESULT
The cursor moves and interacts with windows on both the laptop's built in display and the auxiliary display. When using an active stylus on apps such as Xournal the content on the other display gets scrolled up and down as the stylus moves.

EXPECTED RESULT
The input is only fed to the content on the laptop's built in display & the content on the other display remains unaffected.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon x86_64
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.75.0
Qt Version: 5.4.0-54-generic

ADDITIONAL INFORMATION
Laptop is a HP 15-ds0002na. Active stylus is a HP 1MR94AA.