Bug in Jiguani`s Machinarium

Reference number 1.234.842.804

Hello.
i am with my Titan(lvl62) in the Jiguary`s Machinarium at the first stone altar(at the entrance). i found the small soul core,opened the door to procced into the machinarium, then i joined a party to sell something. as i came back, the front door is closed now,the two teracota soldiers are guarding again,but the map is cleared.now i have no small soul core to open the door again and i cant proceed.
What should i do? I need some help

Thx

Update.
someone ofered the solution
i can proceed now