Insta-break bug

[frannoriega]

I've noticed (and I'll try to explain it as accurately as I can) that players can (while in survival mode) instant break some blocks (as far as I know, stone bricks and fences, but possibly other blocks too) but not "really break them". I mean, the block breaks as in creative, but you can't passthrough the place the block was. Sometimes it is really destroyed, sometimes it becomes "invisible" and you can't get near it because you get "stuck" (for example, stepping on one of these "invisible broken blocks" makes you fall but reappear on top to fall again and so on forever). It only happens with RpgEssentials and with Spout. If a player enters with the normal MineCraft, they don't have this issue. Really annoying, not only for the glitches like the falling, but also because you can't really break those blocks and get the drops.
If possible, I'll get a video of what I tried to explain

I tested each plugin one by one, and this only happens with RpgEssentials. The server, with only RpgEssentials cause this. It's not a conflict with other plugins.

I don't know if you need it, but I could also post the config files and other maybe relevant stuff.
Here is the video with the bug (I could not record it slower, don't know why):
http://www.youtube.com/watch?v=oO4VbKGn0YA&feature=youtu.be