open button on piglins

so, i was joining a world with the seed "Fox" and it was a lucky one where there was 2 canyons on the map, the closest canyon had 4 diamonds and the other one had 5 diamonds at one of the sides behind the coal 

i mined obsidian. 

went to the nether and when i looked at a piglin there was an open button at bottom of screen 

this affects 1.16.0.63 - future updates