https://bugs.winehq.org/show_bug.cgi?id=29249
--- Comment #17 from Jacek Caban jacek@codeweavers.com --- I'm pretty sure wininet doesn't compose HTML listing itself. I'd suggest to test it with Wireshark or similar tool and see what's the difference between native and builtin wininet. That should give a precise hint what's wrong.
Also note that in this case, we control all the stack from MSHTML down to wininet. wininet is called directly by urlmon. It may be that the problem is outside wininet, but if you say that it works with native, then wininet is indeed most likely to be the problem.