I can successfully create a new EC2 instance using an AMI. Soon after launching, the EC2 is viewable through the browser and SSH. Consistently, if I try to view it 10 minutes after launch, the EC2 is completely inaccessible. This is reproducible many times and even happens with a static IP address. What could be causing this?
Perhaps your instance is not providing your AMI what it requires. What AMI are you using, and what kind of instance are you using to host that AMI? Also, does the machine slow down when you try to access it while being connected to it? Or is it just unreachable? I will edit this post adding more information to your issue as soon as you answer to me. ( I cannot add a comment to the OP because I lack the reputation to do so; I hope you understand this ).
edit1: That AMI has quite low requirements. Could you please attach all the information required (together with the output of the required commands like ps, free… etc) in this section of the Bitnami Troubleshooting guide?
The most likely thing I can think of is that your region is experiencing technical issues, though I can't prove it in any way. Hopefully, the output you provide after following that guide will guide us in the right direction.