Known Issue: TMM restarts and produces a core file when MRF messages cross from one TMM to another

(SOL21694039) Known IssueThe Traffic Management Microkernel (TMM) may restart and produce a core file when Message Routing Framework (MRF) messages cross from one TMM to another.This issue occurs when all of the following conditions are met:MRF messages travel from one TMM to anotherAn asynchronous operation occurs at the same time. For example, this issue can occur when persistence is configured on the BIG-IP system.ImpactThe BIG-IP system temporarily fails to process traffic as it recovers from the TMM rest