Web Acceleration profile for HTTP 1.1 cache control

Have a look in the profile configuration. There is options for minimum and maximum size for example, that is important to make sure includes the file you need.

Here is the solution that provides an overview about the profile:

https://support.f5.com/csp/article/K14903

Here is how you can view the content that was cached:

https://support.f5.com/csp/article/K13255