Lots of players seem to appear as shift sprinting, they might be hacking or they might not. But if you are getting lagback, you are either properly lagging or getting hit by the server bug. If you get lagback simply hold shift, walk forwards and keep jumping. After about 5 seconds you can unshift and be back to normal! I Hope This Helped You!
-RyderTheSpider
-RyderTheSpider
