"W" key does not work properly in 1.16. "W" key delays when no longer pressed, and stutters when running. "W" key will not respond to double tapping key to run forwards.

"W" key works in previous versions of Minecraft (tested in 1.15.2)

"W" key works in other games/programs. any other key (for example, "R" key substituted for "W" key role) will work in 1.16.

EXAMPLE ATTACHED OF OTHERS WITH SAME PROBLEM: unknown if examples are in 1.16, may be 1.15, unconfirmed,