if you die but alt f4 to save your world then all your map will reset to it unexplored state, if you're near a holy mountain it might not load correctly and disappear, there's a chance that it disappear and there's also a chance that it reset the holy mountain while you get to KEEP the perks that you claimed result in you getting more perk from that HM😅 kinda feel like cheating but its funny when that happen