there was a small chance your bolt was assembled upside doen, but if you can see it then there is a problem with sear connecting with the cocking piece (don’t kill me over the parts names, it’s been ages since i done any gunsmithing) i made a mistake of decockimg a bolt on a M70, ages ago, but you can’t fit that bolt back in once it was decocked
there should be a recessed edge in the back of the receiver, that pushes on the piece that you push on when you #### or cycle the bolt, find ot why they don’t meet up and you can solve the problem