I would update to kmeaw 3.55 CFW and chunk the dongle out the window (well, ok..........maybe store it in a drawer ).
I honestly do not recall having the issue when I was using either of my dongles (and that truly is something I would've noticed), but I will say that you will have much better luck in getting support around here if you update your console.
While there are still a few lingering people using dongles, the vast majority have switched over to CFW's that do not require one.
If you do switch and still have the issue, you will be much more apt to get pertinent info regarding the situation.
That is just one guys opinion and it is worth exactly what any other persons opinion is worth.
I would much rather go to my grave not needing my gun, than go there wishing I had it.