High consumption of CPU after upgraded to 11.6.0

I have the same issue on a set of 4000's running LTM, ASM, APM, AVR, and AAM in a failover HA configuration. top shows that mysqld, tmm, and learn_manager are using the majority of the CPU. At times I see mysqld using 95%+. I put in a ticket with F5 today. Another issue I'm having (which may be related), is that pulling up illegal requests (Security->Event Logs->Application->Requests) has gone from 30 seconds for the page to load to 5 minutes plus since we upgraded from 11.4 to 11.6 HF3. I have another ticket in for that, but I'm wondering if the issues are related.