On the brand new 1.21 update, when i created a new world and start my world, and gather materials, it seems when i craft something on my android device, it lags when i craft on the 3 by 3 bars to get some tools, and sometimes doesnt even put some items in the crafting. So when i leave the world and come back to it. It keep getting lag when i craft something or anything.
I think some players on android devices has rhe same issue.