Touchscreen scrolling stuck in text/image selection mode after slow or stationary finger movement in KDE
Expected behaviour
When scrolling with a touchscreen, page follows exactly as finger tip moves, no matter how slow the movement is, and no matter how long the finger stops moving but still touching the screen.
Actual behaviour
If finger is moving very slowly or being stationary while still touching the screen for a few seconds, touchscreen scrolling no longer works and swiping on the screen triggers text/image selection, until touching the zoom box.
Steps to reproduce the behaviour
Scroll a pdf document with a touchscreen very slowly, or hold finger on the screen without moving for a few seconds.
Package version
Evince: 3.30.1-1ubuntu KDE Plasma 5.14.5, Qt version 5.11.1.
Linux Distribution
Kubuntu 18.10