Yep! I tried it 3 ways. Mattress at the front, at the rear, and in between. All 3 still left a gap between the rubber seals, unfortunately. I could see the orange tent material with the tent closed and latched shut. I’m not complaining, just letting people know.
It could be because it’s a brand new mattress, not sure.
I’ll take some pics and maybe a video showing my closure. Considering how these are handbuilt, and vary between vehicle makes/models, it’s possible the slight variances are at play here.