Are you using the Akamai hosting option for your DTM library? If the answer is yes, then this post is for you!
We have been working with Akamai to implement cache control headers on DTM and Launch libraries. This functionality is now in production for both Adobe and Akamai. This means that all production libraries hosted on Akamai will now have a cache request of 60 min included in the header. However, this still a request and is up to the browser to respect the request.
Previously, we were not setting the cache control request, so browsers would make their own caching decisions, which lead to unexpected results occasionally.
If you are using DTM, there will be no action needed on your part. Your production library will have a request of 60 min and your staging library will have a request of 0 min (don't cache).