Hello,
I am glad you're having fun with the map and i am very sorry to hear that, but sadly i cant do anything myself since this is a pavlov server issue. Every map has this problem: after 1h10-1h30 the server close.
Simon ( The maker of the original Minecraft Zombies ) asked the Pavlov devs and they said it was to prevent
any issue if its a ghost server that cant shutdown.

The only fix that can offer is to host your server and it wont be a thing
Again, I am very sorry, i just hope Pavlov devs will find another way or put a longer timer.

okay thank you for your feed back! we have tried hosting but had the same issue, are the devs going to fix this?

I hope they will, as one of the devs said it shouldn't happen if you host the game..
I am gonna try and contact the Pavlov devs to see if they are planning to fix this.

Again, I am sorry... I know it is really annoying and it's frustrating to not be able to do anything for this :/

i know! really want to fight it out after the final door haha! but thank you hopefully they sort it

By host. The dev meant to make a custom dedicated server. Not just go into online and make a lobby. That is still on Pavlov servers ;)

I might be asking too much here but would you be able to recommend a guide or video you know of that would show how to host your own game? I rented one online before for 7 days to die, is it the same process for every game? Thanks if you can help.

I solo'd it and got all the emeralds by the 25th round. exactly 1 hour 11 mins in the server crashed as I was approaching the mansion to see what was in side. :(. I dont know what is inside......

Hey, I never done a Pavlov server myself, the only thing i can tell you is to look here:
http://wiki.pavlov-vr.com/index.php?title=Dedicated_server
Hope you can find what you are looking for