T-Bear, I've seen the same.
The attribute doesn't actually change it's properties to left justified, it still remains as centre justified but appears as left justified.
I've exited the drawing and return & it has then appeared correctlly, I think even a regen may have also made it appear correct.
It's possible the cause is a graphics issue or system running a little low on resources so it's not refreshing the screen properly.
(just stabbing in the dark with this one as I have no idea)