check you connection from the mouse to the receiver, make sure it is picking up the commands in due time whilst on freelancer.
Also check the information about the mouse. may need to search on google. Too see if theres any known issues.
If problems persist check your lagg, (type /ping). If thats fine and all is good so far make sure the area around the reciever is free of junk that may interupt commands, this includes other electrical equipment.
If it continues to happen then find a new mouse.
Thats the best Advice I can give you.
Clear area around the reciever.
And making sure the reciever is picking up the commands from the mouse.
Another thing worth saying may be related to mouse sensativity, but I'm not sure about that personnally how it would effect delayed actions.
have been using a wireless mouse for FL combat since the day the game came out, so it cant be that. have been using this mouse for 3 years... is not mouse.
have had problem with keyboard, but it cannpt be connection, as have had worse connection than this...