ScrollBar repeatDelay is triggered only once and ignored each subsequent try

Steps to reproduce:
1. Set the 'repeatDelay' style of a scrollable component to 5000 and 'repeatInterval' to 100
2. Click and hold the scroll track of the component and wait for the 5000ms delay to trigger pageScroll events at 100ms (repeatInterval)
3. Release mouse button
4. Repeat step 2

Actual Results:
There is no delay for the scrolling intervals.

Expected Results:
There is a 5000ms delay followed by 100ms intervals.

Workaround (if any):
No simple workaround since all timer properties and methods are private in the ScrollBar class.