I managed to get stuck here by hookshotting to a tree. I didn't have the flippers at the time, so had to F6-continue.
I had a problem with this particular warp entrance. Every time I entered the warp, but only if I entered this screen in a way other than spawning from one of the other warps, no matter which portal I chose inside the pictured warp, each portal would warp me right back to the screen above. I could go inside the warp on the screen pictured above and warp somewhere else, but only if I took a warp to this screen - if that makes sense. I didn't have any problems with the other 8 warps.
Are these just junk artifacts that show up when using the lens? FWIW, I noticed a lot of junk artifacts that the lens shows, like false-walk-through walls and gray tiles, but I keep wondering if those two pictured above are actually relevant.
Edited by Marv Albert, 21 January 2019 - 11:53 AM.