Application Web Pages Not Being Served Correctly by F5

Hi, we have exactly the same problem. I turned off caching, compression and sets the default tcp profile, but problem remained. We use SSL on client and server side so troubleshooting is quite difficult. When client (browser) send request randomly some resources (like css, js, gif, ...) aren't transmitted. After defined period (default 300 s. Idle Timeout) BIG-IP send reset packet (TCP - RST, ACK) When problem occured request is not present in ASM log (full request and response logging is enabled) We use HA pair (active-pasive) release version 11.3 hotfix 7. Any ideas?