Help me with this bug please

the bug is: whenever i hit a zombie with a melee weapon it gets jammed in my hand. im trying to hit him with a rake,hockey stick ETC. i also tried de-equipping and dropping but did not work! please help!

Possibly server issues, what is your ping? (Turn on FPS/Ping counter in the options, it should be the first option)
The lower the ping the better. Also a frame rate below 30 has given me latency issues from personal experience

My frames used to be around 19-30 and my ping is always 0 ( not always sometimes the max it goes to is 5)