Originally Posted by RayTrue04
I doubt its a bug. I had all types of Sprint phones and they all did that. It does it a lot on 3g. Its like 3g steals from the bars..
Sent from my SPH-D710 using XDA
It is a known issue with most of the leaked builds that have come out recently. The bars for Wifi, 4G and 3G were all effected by it. It was purely visual. Qbking77 mentioned it in just about every review he did for the different leaks (and it's been thoroughly covered on several development threads).
If you'd like to confirm your actual signal strength, I'd recommend using a third party app to see what your actual signal is.
Supposedly it was fixed in FC15 or FC18 but I don't remember which it was.
Hope this helps!