Practice Make the practice maps 2 blocks thick

[Uwayxcars]

Minecraft username:

Uwayxcars​

Suggestion:

Make the practice maps 2 blocks thick​

Detailed description:

Make the top, left, right, front and back walls 2 blocks thick in flat maps.​

Reason(s):

I always clip through the ceiling when I'm pearl catching close to the ceiling. Another reason is that people sometimes clip through the walls to avoid fighting people on gamemodes with pearls included in it​