I accidently logged in to Hypixel on 1.16.1 when meaning to join my own server. I then exited out of Hypixel quickly and joined my own private server.

After Joining my own server the terrain changed but i still had collision with the floor from hypixel. My custom scoreboard also remained but all of the hypixel UI was also there at the same time. I could also interact  with many of the things on the hypixel server but could not interact with things in my hotbar. The chat was visible on my server as well as i could make myself and operator and it would show up in chat. 

I then got sent to hypixel AFK and fell into the void and died. I then respawned in my world with all of my admin privellages but some hypixel messages still showed up

https://photos.google.com/photo/AF1QipOctx2WCvwOOMg-WQFQxysoUiQmS1cW7uKkkNo

Other video taken too large for the attachment