When using type on path tool (and then direct selection for realignment), the brackets to realign often don't appear regardless of how long you tediously go over the path trying to get the cursor to change. In the off chance we can get them to appear, often it isn't possible to drag the text fully to where it needs to be to go in place before the cursor jumps. This isn't happening in Photoshop, only Illustrator, which leads me to believe it is a bug.