Big Sur typing lag
I have the same issue. MacOS 11.5.1 on a MBP 16" 2.6Ghz i7, 32GB RAM,4TB HDD, and even typing this is nearly impossible. There is lag, missed keystrokes, and it's random. The Bluetooth reset did not work for me. Did not have any issues prior to Big Sur.
MacBook Pro 16″, macOS 11.5