> You will be relieved to hear, I have been able to reproduce the issue. However, only at random. I am now looking for a pattern.
Strange, it's very consistent on my side.
I will try installing on a windows host like yours.
> For the time being, does it help when you replace the first tag of your login form with:
Noope, absolutly not.
The only thing that does help is the loginStorage=Cookie mode.