Why doesn't my toggle sprint work?

When I try to turn on toggle sprint in Minecraft using the Badlion client, it does not work, although I have switched it on, I can't use my toggle sprint, but sometimes ea works for some reason.

Servers can manually set certain mods of a client on / off. Tried once in single player?

Unfortunately, if neither works, the problem already existed on the Mac book that I had pressed any key until it worked.

For me it doesnt work but works Just sometimes