I don't really know what bug it was but it was bad.

I was exploring in Minecraft in an ice biome when I want to swim to get to my destination because it was faster to swim when I went and swam I was about to drown so I used my echanted pickax to mine the ice but it was not breaking in it was like bedrockI lost lots of things like enchanted gear a sword and I lost lots of other things and I had a enchanted armour on me, then I deleted that world straight away.