[RoyalTermite]

Originally Posted by 4 Scale

Reset/trigger issues are not uncommon. Fortunately the fixes are often straightforward.

I would ask some more questions:
How long have you had the pistol- you mention ten rounds, or have you fired it other times?
Have had the pistol a few years. Fired about 125-150 rounds without problems.
Using snap caps, can you replicate the failure?
Have not tried snap caps yet.
Using snap caps, get your daughter to replicate her technique for firing and see if it fails?
Any chance at all the side plate was not fully seated?
Sideplate was fully seated.
You should be able to check the sear plunger movement with your finger for free and correct function BTW, just remove side plate.

Really strange thing is I would clear the round for my daughter, next round would fire and then bad trigger again. I would then reload mag and I would fire off 7 without a hang up. Give the pistol back to her and then same scenario as before.

I have since stripped down the pistol and cleaned it extensively. I will try the soak method just for good measure.