Is anybody else having any issue with the Audio 3 server going down and coming back up in last 3-5 mins.
No, no problems on our end. I have a number of feeds on audio3 and they haven't experienced a single hickup.
In checking the log on your feed it appears that it's been going up an down quite a bit. Things to check
1) Internet connection going up and down?
2) Are you running anti-virus on your computer? If so, it is a widely known problem that anti-virus software scans/processes impact feed availability.
Among other times, my feed has disconnected at exactly 5pm central on each of the last 3 days. Using RadioFeed.