Henrietta's Hideaway Stuck in Collection Chest Room

[SnipeyWipey]

As the title says, I am stuck within the collection chest room, not out of it. Has anyone ever had this problem or am I stupid and missing something obvious? The metal door will not open and closes behind me every time I pas through it. I use incendio on the cube spot and it semi opens and then closes right away.

[AmsterdamHeavy]

Is that the part where you need to levitate the cube to the other side of the door through the hole in the top?

I might be remembering wrong but one is fire and one is ice, isnt it?

[Akunamatata]

Please, be more specific about the location you're talking about. If you're talking about the room downstairs with the Inferi, once you pull the cube through the top opening in the grates, put it on its base and ignite it, the door should disappear and stay this way.
It could be a bug or maybe it has something to do with a hidden room to the right of the Hippogriff statue - there is another ignite-able cube there, though I'm not sure which door it opens. Look at this video between 01:10-01:45.

[SnipeyWipey]

Thanks for all the responses. I managed to get it to work by reloading a save and leaving the inferi alive and killing it inside the room. Not sure if that was part of the problem or I just got lucky or whatever the case may be. It is resolved at this point. Thanks again.

[Akunamatata]

You're welcome, glad to hear your issue is resolved.
I always killed all the inferi from outside the room and never had problems like the one you described. I think it was just a weird random bug.