Attack unbind on startup

Product: Apex Legends
Platform:PC
Please specify your platform model. PC
AMD or Nvidia Model Number Nvidia gtx 1060
Enter RAM memory size in GB 16
What is your gamertag/PSN ID/EA Account name? jakethegreatwite
Please provide your squad mates' gamertag/PSN ID/EA Account name if possible.
Which Legend were you playing (if applicable)? lifeline
Which Legends were your squad mates using (if applicable)?
Where did the issue occur? In the lobby (waiting area before the match)
Which part of the map or menu were you in? If you don't remember the exact name, please describe the area or what you were trying to do in the menu. not needed
What were you doing when the issue occurred? E.g. respawning a squad mate at a beacon, using an ability, a squad mate left the game. starting up
Did your squad mates also experience the issue? I don't know
How many matches had you played in a row before the issue occurred? 0
When did this happen? (dd.mm.yy hh:mm) 6/4/19
How often does the bug occur? Every time (100%)
How severe is your issue? Major impacts to gameplay
What happens when the bug occurs? the attack button is unbinded when starting up
What should be happening instead? should be left mouse
Steps: How can we find the bug ourselves? startup game and look at bind/ play a game and die from being helpless

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any questions please ask