I know I'm a couple episodes behind, but Doc and Ren's travel from the big dig server to Hermitcraft got me thinking in a major way... there's a LOT to unpack there if you want to overanalyze some fine details (which I usually do!)
Doc seemed certain that they needed to go through the Void. He asked Ren to go with the plan on trust alone, and he himself jumped in there with no hesitation whatsoever. However, after they respawned, he seemed almost confused that it worked and didn't even know how it worked. He brushed it off, saying something like "best to not think about it," and moved on.
Tried to move on, that is. His connection glitched out moments later, confusing him even more and concerning Ren. Ren brought up the possibility that the Void had messed with their minds a little, and Doc enthusiastically agreed that they shouldn't use that method of travel again. The way he said it was almost toned as though it was a thing he'd thought all along: you shouldn't travel through the Void, of course not, that's just common sense.
And yet, he did do it, just a few minutes earlier. Strange.
Here's my theory: I think the Void caused an issue with Ren and Doc's cybernetics. When Doc jumped in there, there was some glitch or mechanic that he was exploiting that he knew would get them from point A to point B, but he didn't predict that it would play havoc with them in the way it did. He just went for it, in typical cocky Doc fashion, and in typical fashion it worked! ...Just with a few minor (major) unforeseen drawbacks. I think it shorted out Doc moreso than Ren because Ren's construction is a bit more... unconventional. He probably has a lot more physical wiring rather than the wireless signal and more delicate electronics that Doc's cybernetics probably use, since Doc has had years to perfect his and Ren was quite literally reconstructed in a van. I think that made Doc more vulnerable to whatever ambient energy there is in the Deep Void (the void between worlds).
Doc now has a gap in his memory. He doesn't know what glitch he used to get back to Hermitcraft, and he doesn't know how he learned it. Who knows what else he might have lost? Even more worryingly, his connection as a player to the server seems to be frazzled. Maybe whatever part that helps the game to recognize him as a player rather than a mob was damaged, and the world is now confused about his existence at a fundamental level...
Maybe the effects will fade. Maybe they'll get worse. Maybe the mysterious entities that keep giving out books and coordinates have something to do with it. Maybe the memory alteration was intentional, and the Void was simply an excuse, a convenient way to make Doc believe it was an accident.
Maybe there's someone else steering the plot. Making small course corrections, making sure Doc and Ren don't get too close to the answer too soon.
Or at all.
Either way, they should probably both stay away from the Void for now.