This map has been removed as of 1.3.
Temporary fix in 1.2: replacing the death wyvern with wraiths. Bug will be kept open as a Golden Lair should really have a dragon guarding that hoard.
After about 30 seconds of moving around the Golden Lair, the game freezes up completely. This happened 3 times in a row thus seems to be consistent.
For what it’s worth, I’m playing as a warrior that’s level 12. I did not need to swing any weapons for this freeze to occur.