Bug#833706: seems it's fixed in

seems it's fixed in the daily installer builds, and thus it should be safe to assume the fix will be part of the next installer (alpha 8?). grab daily build copy here https://d-i.debian.org/daily-images/amd64/daily/ , it works for me. according to a guy on irc://irc.oftc.net/#debian-boot : (...)

Bug#833706: happens to me too

happens to me too, using iPXE pxe boot to netinst image, amd64, real hardware, Installer build: 20160630