Has the OP tried different ammo and gotten the same result with whatever ammo he shot?
Charters can have a break in period and I'd advise getting snap caps and dry firing 500 or 1000 times. Any burrs that might be in the firing pin channel or on the transfer bar or hammer/hammer slot will get knocked down and reduce any potential drag.
It doesn't surprise me to hear of light strike issues, this seems to be a widespread problem with Charter revolvers since Covid and it seems Charter has a cookie cutter approach with their repair process where they'll just slap in new parts and hope it works. I assume the issues are stemming from new employees who can't catch production issues and fix them because they don't know how or aren't paying attention and management is shipping product out the door regardless of quality because they have bills to pay and being the small company they are they can't junk a night's worth of work.
For as bad as I want a cheap DA .22 snub and how many have suggested Charter, I won't touch them, at least not any new ones. I'm glad the few I have work, but they're older than me, so that's why.