Clutch fork won't clip back in.

recently had what sounds like the exact problem and I chased everything and on mine it turned out to be the pivot was bent.

It was bent enough to create a problem but not bent enough to be obvious at first glance. It wasn't till I put it next to another known good pivot that I could see how it was bent and where my whole problem was rooted. As soon as I swapped them out, everything went in as it should and I have been driving it with no problem.

maybe bend your pivot in towards the input shaft a tad and see if it helps any.....