SUMMARY
The hover cursor is the circle that appears on the canvas as you point the Samsung S-Pen at the screen without touching it. At some point when you draw, the cursor will stop following the pen and only move when the pen is touching the screen.

STEPS TO REPRODUCE
1. Not exactly sure what causes the above, but after drawing enough brush strokes on the canvas, there will come a point where the cursor stops moving as you hover your pen above the screen.

OBSERVED RESULT
Hover cursor stops following pen.

EXPECTED RESULT
Hover cursor always follows where the pen is pointing.

SOFTWARE/OS VERSIONS
Android build based on Krita 4.3.0 stable. OS is Android 10.
Hardware is Samsung Galaxy Tab S6.