I'd test this in other browsers since Chrome is essentially an OS with a web browser front end.
You can test Chrome out as time passes and new versions come out for Chrome and Discord but the usual fix is to try the other major browsers.
i5 7600k @4.4ghz
When i'm tabbed into a game chrome discord ext runs slow and buggy. R6S is the worst offender. tried many fixes none have worked. On discord audio cuts out, chrome Youtube freezes. Any suggestions would be greatly appreciated.