We’ve experienced this issue with several RB750’s. Processor at 100%, Winbox unable to display information in Interface and Queue fields among others. Profile indicates Flash is consuming all resources. CPU typically at less than 20% until the bug surfaces. Seems like a simple fix once the cause is identified. I just let them run and they eventually recover. Without knowing the filesystem and other parameters, any suggestion is conjecture. I’d like to see it addressed as it is a reproducible behavior. But, we ask a lot of these SOHO routers so an upgrade to the RB1100 is realistic.