Any version of a TNT cannon is broken. I have tried 8 variations of cannon types, and on each cannon I tried ladders, slabs, fence posts, glass panes, jail bars, blocks, and extended pistons. On each of these types of cannons, the TNT was not propelled forward. It just sat there. I know these cannons all worked in previous versions because I had tested them. Now not a single one works now. I tried it on 1.10.1 on Win 10, 1.10 Kindle, and 1.10 Android versions. They all failed.