Re: Leaf/stem issues on indoor large bananas
I've run into this myself. In fact, I have photos in my album of a freakish situation where a DC did not send up a flag before I hacked off the top to fit inside for winter ... the top got choked up from the drying out process after cutting (like yours), so the bloom I didn't know was inside ended up doing an "Alien" and splitting the side of p-stem once back out in spring since it couldn't come out the top.
Definitely follow the advice to remove the portions of the previous leaves that are impeding the shoots from coming out. If you cut across the p-stem again, you will probably be in the same boat when THAT cut dries and starts to shrink and choke the new leaves.
Ahh, maybe ONE day I'll live in a clime warm enough to not have to even bring them in for winter ...... (insert chorus of "I Can Dream, Can't I?" here).
Best of luck,