I have started having this problem within the last week or so, and it is getting worse each day! I've tried clearing the cache (power off/volume), and it has not helped. I've checked for updates and it says there are none. I'm at a total loss as to how to fix this, or what went wrong to begin with.
I think I'm down to a factory reset, which I hate doing as I have customized my arc (different launcher, etc) quite a bit.
Anyone have any suggestions as to how to correct it, or what might suddenly be causing it?