Whenever Celine receives haste; she gets a couple of enhancements on her character sheet - the most important for this bug being the "Movement Speed Increase" flag.
As a Duelist, when Celine uses Improved Reaction, and then doesn't move, a strange bug occurs. The Movement Speed "flag" doesn't drop; it just stays on.
If I accomplish this feat (it doesn't happen 100% of the time), then the next time Celine uses Improved Reaction, she keeps the Haste Movespeed buff after the haste wears off. It lasts until I rest.
However, even after I rest, the Movement Speed "flag" doesn't drop off - it stays on. So I pop Improved Reaction again, and Celine's got perma-speed until I rest or the server resets.
Just thought you'd all like to know.
- Featherfox