@s0wj3tsw4gl0rd What I can suggest for input delay is exclusive to hardware. Very rare instances it's due to lag but then that becomes a communication error, which would be your internet.
Try re seating the tab key, checking for dust or fibers and check for damages to the board. Use a free online program to check key presses to make sure there's no latency or issues with keys surrounding the tab key as well. If applicable, try a different keyboard.
Once you can rule out that it is not a hardware issue, move on to connectivity. Try switching servers from the main menu by hitting tab.
