buggy f3

(BTW this issue is in 1.8.9 but i couldnt select this version in "Affects Version")

Hello , i have this problem in minecraft in lunar client that when click f3 then it works normally , but when i hold f3 then i still shows the debug screen.If i click f3 and a, this works kind of weird way and my avatar is walking, when i click f3 and q , it doesnt work.