KJW KP-05 Firing In Bursts

[ardo]

My KP-05 is about 2 months old, and was flawless until now. Last week, it started firing in bursts while the trigger is pressed. It does so even with a new CO2 capsule inserted (I only shoot CO2).

I did find the potential fix on the net, and bent the sear spring leaf a bit forward. Afterwards, the first 15 or so shots were OK, then it started bursting again.

Should I replace the 3-leaf spring, or could this be another problem? TIA.