Cocking problem?

[apis mellifera]

Maybe I'm asking a completely obvious question, but would/could the unmodified parts (those pictured above) cause a trigger to not be reset? I posted a question about this (see below, with updated info) and before I go whittling on these pieces, I want to be sure I understand how they interact with each other.

1. Insert loaded mag
2. Work action, chambering round
3. Pull trigger
4. Gun fires
5. Gun ejects spent casing
6. Feeds next round
7. Pull trigger, but nothing happens. The trigger hasn't reset.

If I start again at step 2, it follows the sequence again. Since the trigger is rest during the first part of toggle motion and the gun does eject and feed properly, I'm lost as to what is wrong. Also, if I dry fire it and work the action with the trigger held back, it will replicate the reset problem. Any suggestions on what to replace/fix?

Many Thanks,
Matt