Without pre swimming or elytra action,you can walk/jump through the first layer of leaves on trees.
If you walk into a tree(we (me and rowan42how)) were on a multiplayer game on 1.17),I discovered that I could walk through the bottom layer of the oak trees in my world.This might only be a problem which only happened to me (as it didn’t occur for rowan42how),we were still concerned though,as it may end up being exploited as an x-ray glitch in servers/competitive games.I didn’t use an elytra,and am not wearing one in the photos. I could just jump through the first block of leaves as I’d only just joined.I think this should be reported as a new thing,because I had searched for being able to jump through leaves,but that didn’t work.Any help would be appreciated! ![]()