Fiftydriver
Official LRH Sponsor
I've had that happen with unmodified Remington triggers, and seen it in others. One cause is getting to much of the wrong kind of lube, it gets cold, or accumulates a bit of grime and it will fire when the safety is pushed forward. The aftermarkets are a step in the right direction, I've also used the Gentry 3 position safety with success. Installation is a bit trickier than advertised, it's not a substitute for muzzle control, but a better mechanical safety in my opinion.
The striker lock safety systems such as the Gentry is a great option but it also can have issues. I have seen situatons where the cocking piece retainer on the trigger got hung up in the trigger housing and did not return to battery properly or was knocked out of position while the safety was engaged, then when the safety was dropped, the striker fell.
Again, all safeties can fail, DO NOT depend on them to save your butt!!