The design of the new trigger is enclosed. I have seen at least two enclosed freeze up rendering them useless. That is a problem. The old trigger design has fewer parts, is less susceptible to water, debris, and access for cleaning etc.
Two of the new model Winchester triggers froze up eh, well. I’ve not seen that myself but hey it could happen. You could’ve led with that though, it’d be much easier to believe rather than assume you where just repeating something you’d heard on the Internet. I find the new trigger just as good all things considered as the old. I like both. It does take some heat and a bit of time to adjust the new trigger the first time but after that your golden!