slider knob text selection issues

Steps to Reproduce

<zk>
	Text before
	<slider mold="knob"
			minpos="0.0" maxpos="100.0"
			curpos="80" step="1" width="300px" angleArc="360"
			style="border: 1px solid black;" strokeWidth="120"/>
	Text after
</zk>

1. Select the text from "text before" to "text after"
2. drag the slider knob

Current Result

while dragging the selected text is dragged as well
after releasing the mouse button the slider keeps following the mouse movement

once the problem happened the whole page can't be scrolled anymore using the mouse wheel

Expected Result

same drag/drop behavior as a normal <slider> component

Debug Info

Root Cause

Workaround