I recently made a full playthrough of version 1.0 and I bumped into the bug multiple times when trying to actually win Nethack. Thankfully, I discovered the workaround: Leave the console and join again (thankfully, Nethack saves progress).

Triggering this bug is common and very likely if you want to win (but fail a lot in the first tries lol); it took me about 1-2 hours for the first win so it is definitely realistic to trigger.

Now that 1.0 was released, I think this bug should no longer count as postponed?