White block?

sooooo I am really confuse.. anyways I was minding my own business on my server and by the way I am the only person on my server since I don’t have any Minecraft friends.

and I was just wondering around when I found weird white Block at first I thought it was snow but it couldn’t because it was in water… I thought it was weird so I’m tried  to break it!
(I was in creative mode at the time) but it wouldn’t I thought it was a block that just didn’t load correctly?, you know trying to think logical! But I broke the ground underneath it and it stink like gravel or sand, and I don’t Think it was there  before otherwise I would’ve noticed it, was very big to be a Minecraft block it didn’t stick out of the water! And I don’t think it was ever there before, and maybe it was just the device that I was using.. but what was more confusing, that I could walk through it. I took screenshots like I said nobody is on my server and I have no mods that could’ve cause this I just play the original Minecraft with no mods or anything. I can’t think of anything else I could’ve caused it. Anyways I think that’s all I can write for now I don’t have anything else to do okay sit in the glass it’s still in the water I didn’t try anything else for now and it wasn’t lagging whenever I went near it it was just there (and at when I said it was snow I thought about that and it was way too big to be snow) anyways hopefully you get some information out of this and this has never happened to me before, I don’t think this was a glitch that was going around so never heard about it!

anyways I better go now feel free to ask me any questions!

love,
madison,