I'm currently without a screenshot, but I can post one when I get home.
The issue is simply that the sunburst animation that triggers after I shoot the sun with the Sunhallowed Arrows simply won't go away. Every time I return to the area where I did it, the effect triggers, sans the damage effect. The sky lights up, day or night, with the effect, then goes away. If I transition to a new area and come back, it returns. Is there any way I can fix this?
I have fired additional arrows to see if this problem persists still, and it does. I can essentially infinitely stack sunbursts and I can't seem to clear them out.
I'm currently only running a completely vanilla build, no mods on this save at all, although some minor console work I had to do to clear some bugged quests and whatnot. My save doesn't exhibit any other strange behaviors, and a complete reinstall doesn't solve it.
If it matters, the effect is in the sky just outside Whiterun. Other than all that, I can't think of anything pertinent to the bug. Any help or insight would be appreciated.