It the liner isn't worn out, I would try to self-service it by disassembling the knife and bending the liner to the left. But don't bend it so much that you don't get positive lockup.
I would also check to see if the liner isn't curved, that is, bent into a radius. If it is curved, bending it straight will make it go back to locking on the left.
With my 2004 comm, I bent the liner too much to the right, made it curved accidentally, and it was always locking up to much on the right and galling too much. After straightening it, it was OK.
Then I tried bending it the other way(the left) too much, and it underengaged, always slipping off the tang to the left. Not enough rightwards-springforce in the liner.
Now I have the liner tuned to just a bit too much overengagement. The liner locks up near the centre of the tang ramp, with a left bias, and has a lot of right-spring to keep it from slipping left off the tang ramp.