Bug in The Chapter Before the Last. Can I have an answer?

Hi there ! (Sorry, I’m French, so it will be hard for me to explain correctly the problem !)
In French, this Chapter’s name is : “L’ascension au Royaume Supérieur” (I don’t know the name in english, sorry …) it’s litteraly the chapter before the last one before we finish the game.
I don’t know if the bug is knowing here but I will explain that :
It has been 3 times since I restarted the mission in reforged in hard mode.
After the boss kill, the door is supposed to open on its own. Only it remains closed, and I cannot open it by any means. I get stuck in this level without being able to move forward, I find it very boring. Could you do something about it, please? I saw that I was not the only one to have this problem …
Thank you very much in advance.
Bye Bye. :heart: