I'm the other guy mentioned in that thread.
I just put 300 rounds through mine suppressed this weekend, only the first round had hammer follow all the others functioned normally. I changed the initial springco blue/H3 to a springco white/H2 after 90 rounds due to not locking open on empty mags, now it cycles fine.
It seems to have cured the issue, of course it'll take another several hundred rounds before I'm willing to be 100% sure. I may shoot off a couple hundred more tomorrow.