No story.
I was shooting. came back to the bench to unload the spent shells. opened the cylinder (I have decades with revolvers) and went to hit the plunger with my finger and it wasn't there. I felt it hit my foot. Good thing I like clogs. I immediately put the empty pistol on the bench and carefully found the plunger in the grass. looking at the revolver I found a small tringle part and another with a really small spring, where the plunger would have gone back into.
Been using the revolver for years and never a moments issue.
I will be calling Frontier soon. Thank you for the response.