The elevator allowing you to fall through is a glitch that happens usually when FPS is low I think. I haven't been able to replicate it myself but we've tried a few things to fix it before, obviously it isn't 100% fixed though if you're still getting it. We can try something to perhaps fix it for 2.92, if you fall through ideally it should at least reset you back near the elevator.
We also have fixed the ending screen not working when being rebound for 2.92. Once the patch is released, space should always work as well as whatever you have rebound Dodge to.