The standard error issue that I’m aware of never made it into a release – there have been some intermittent issues with weights but I don’t think they’re related.
One thing I saw when skimming the thread is that there was one fit at the top with nAGQ > 1 and fast=true. This corresponds to a configuration that simply isn’t possible in lme4, namely AGQ but while optimizing on only the random (and not the fixed) effects. In lme4, you get the Laplace approximation (nAGQ=1) when you optimize on only the RE (confusingly with the option nAGQ=0).