Switching weapons randomly

I've seen some people have this issue but not since bf6 was released a few weeks ago i kept shooting at people and on the rare occasion my weapon would just swap to my secondary/pistol then the other day i got a new keyboard and it started happening a lot more like every 2 seconds only thing that fixed it was removing the secondary weapon key then i realised it was happening in every vehicle is there any reason for this or any fix to let me use my seconday slot without scrolling