I'd agree with Judy here, that does seem really likely that that particular bedrock block isn't rendering.
However even in a situation where it was an actual hole in the bedrock, I don't believe that the Solverlabs games actually have a programmed void that you could fall through.
Back on the game World of Cubes around 2014, there was an old terrain generation glitch where a chunk error could occur that made no blocks generate within a 16×16 block area from height limit to the "void", creating a giant pit in the terrain.
At the bottom of this pit, the area where bedrock should've spawned was completely lacking in it (allowing you to see the void's skybox), however it still treated the bottom as a solid floor (the player couldn't fall past Y=0, and you'd take fall damage if you fallen onto the invisible solid floor from a high place), it seems to be pretty similar to how the rest of WoC's world boundaries are like (invisible, solid block barriers that cannot be broken), but rather than it being a world edge, or height limit, it seems like one of these barriers also exists down below where the void would've been.
Since some world boundaries in PoC are also like how WoC's world boundaries are like (Private Map world boundaries, and the Starter Tutorial Introduction map's world boundaries to name some instances), I would assume that in PoC, where the void should've been there would be an invisible solid world boundary past the bedrock.
Probably just a visual bug. Did you try jumping in the hole? lol
I'd agree with Judy here, that does seem really likely that that particular bedrock block isn't rendering.
However even in a situation where it was an actual hole in the bedrock, I don't believe that the Solverlabs games actually have a programmed void that you could fall through.
Back on the game World of Cubes around 2014, there was an old terrain generation glitch where a chunk error could occur that made no blocks generate within a 16×16 block area from height limit to the "void", creating a giant pit in the terrain.
At the bottom of this pit, the area where bedrock should've spawned was completely lacking in it (allowing you to see the void's skybox), however it still treated the bottom as a solid floor (the player couldn't fall past Y=0, and you'd take fall damage if you fallen onto the invisible solid floor from a high place), it seems to be pretty similar to how the rest of WoC's world boundaries are like (invisible, solid block barriers that cannot be broken), but rather than it being a world edge, or height limit, it seems like one of these barriers also exists down below where the void would've been.
Since some world boundaries in PoC are also like how WoC's world boundaries are like (Private Map world boundaries, and the Starter Tutorial Introduction map's world boundaries to name some instances), I would assume that in PoC, where the void should've been there would be an invisible solid world boundary past the bedrock.
interesting