So, I was wandering around the rooms and once I entered one room, I saw shaman using him totem and it had joined planks on it so you can climb on it. I left the room to find any place with less people but couldn't and returned. The totem wasn't there anymore and mice were walking in the air. Shaman brought dead mice back to life and I got a chance to play. I remembered where the totem was and could walk in air but when I went too high, I fell off and couldn't climb on it anymore.

That was weird... I guess it's a glitch but idk, I see it first time.

Yeah, it happens when you enter a room where a shaman has summoned stuff ^^' You can't see any builds or anything.

Yeah, but I could climb on it for some time, later it disappeared forever and I couldn't climb on it. I didn't see shaman cannoning it away or something, I just fell through it 2 times, then couldn't go on it at all.

When you couldn't climb on it, was it after you left the room?

Yes, when it was invisible. After shaman brought me back to life, I didn't leave the room anymore.

Yeah, it goes back to what I said then. Because it was invisible for you, you couldn't touch it.

I couldn't jump on it and when I ran forward, I kept going up, just like there was a normal plank, just invisible.

It happened to me first time. It's just weird I could climb on something I don't see, that's why I posted it here.