Amazon Launch Template - Updated AMI

Question

I have started using Amazon\'s new Launch Templates and so far liking it however I just recently made an image from one of my instances, I then created a new version of the

Answer 1

UPDATE: Today (2019-11-21) AWS released a new Launch Configuration web gui which no longer appears to have this problem - updating the AMI seems to clear out the explicit EBS association no matter what.

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Original answer:

This is actually a small specific bug in the AWS web console's interface for creating a new launch template version.

When you enter a new AMI ID in your new launch template version, it shows the new AMI on screen, but it shows the previous block device (snapshot) still. If the very next button you press is 'Create launch template', then you unfortunately get a launch template which point to the new AMI but still points to the old EBS snapshot. If instead the next thing you do is scroll down to the 'Storage (Volumes)' list, and click anywhere in the page, you'll see the listed snapshot update before your eyes, from the old one to the new one. Now when you click 'Create launch template' it will create with the correct snapshot attached.