Comet Browser Stalling Out on Mac

Has anyone else experienced lag or stalling in their Comet browser? I'm on the public beta of Mac i26. It happens at least once or twice a day where I'll be doing stuff in my comment browser with many tabs open (usually it's for work). All the sudden it will stall to upload or open a new tab, and then it affects my entire system. It doesn't matter which browser I'm using; it will need to get through the stall which lasts up to two minutes.