They have been discussed, and I am sure that sometimes it happens. I think, though, that access to information provided by the internet creates large problems out of small ones. An occasional problem has always happened with everything man made. The internet causes one person's problem to be amplified, modified, repeated, and spread until it is universal. In reality for the number of Encores made the incidence of weak hammer springs is fairly low, but they are reported as "famous for light hammer strikes." This is made all the worse by accessory vendors who make a living out of convincing people that they have something that will benefit from an add on that the manufacturer didn't think of.
I think the point is that if the guns had all the faults that we hear about, and if it was as common as claimed, then we would all be quite foolish to spend our money on them.
So as to avoid another lengthy discussion like the one about Spanish barrels that just concluded, this is only my opinion. I own it, have a right to it, can express it, but no one is obligated to agree with me. Your mileage may vary.
Good shooting!!