Ringtone Buggy when message incoming

[bluemotion]

Hi,
it's my first posting so i hope it's according to the rules and the question not too stupid.

I just bought an Iphone 4s and have a small problem. Everytime a message comes in the ringtone is kind of buggy. To explain it further: the first tone of the ringtone repeats itself in the start. I first recognized it when a message came in via the FacebookMessenger App then i checked normal SMS ringtones it does that there as well. When i just play those tones normally without a message coming in the tone plays normally but when a message comes in the first tone repeats itself. After that the tone just runs normally.

Hope sb has a solution. Since i couldnt search with the search tool i also hope that that question isnt discussed elsewhere (the search tool just gave an empty page when i hit enter).

Thanks for your help! =)

[bluemotion]

Don't bother. After several restarts it went away. But i still don't know why it was there in the first place