F5 WAF use case for internal network users who access to confluence

[me]

Hi

I’m using F5 products for couple of years, and always use F5 WAF for external users (Untrust zone)

now try to enable it for internal users to protect a (confluence (tomcat)). 

after I enable F5 WAF we have lot performance and functional issue on Confluence,

FYI 1: F5 work on learning mode not blocking mode.

now one question come to my mind, is it logical to use F5 WAF protection for this web server?

FYI 2: this server has no internet connection. Not published on internet. Only internal users in LAN able to access this server.

FYI 3: I see lot’s of people have issue with confluence and F5.

here is the question on f5 community  

Any idea?

Thanks