this is a bug where the profile picture for your world is a pink and black checkered box. it happens on my Windows 10 edition and my Pocket edition. i thought it was a hack, it might be, but now i think it seems more like a bug. i have played in in this world before but the picture wasn't a pink and black checkered box then.
if you think i was hacked please tell me.
⚠️ Issues that concern Minecraft (Bedrock version) should be posted on the Minecraft (Bedrock codebase) tracker. I have moved your ticket to the correct section.
Your not hacked, the pink black checker pattern is a missing texture placeholder.