If a user is currently wearing any hat on their head, it prevents all forms of forced teleportation.

(Teleportation Commands,)
(Warp Games,)
(Arena Plugins,)
Pretty much everything

I would like to add that this bug is actually an extremely huge deal.

I thought it was harmless but annoying at first, but it turns out to open up dozens of other bugs with other plugins, all because of this bug.
Some of the bugs caused by this are extremely dangerous, and can be used to exploit items out of mini-games, or to duplicate items.

I've managed to hack-patch around most of these bugs with commandhelper scripts, but those were just hack-ish workarounds, and I'm sure I didn't even get all of them.

See #9. This was originally a CraftBukkit issue and nothing to do with EchoPet.

Thanks for taking the time to report, and sorry for my delayed reply.

@DSH105 According to ticket #9 , PR #Bukkit/CraftBukkit#1191 was pulled, fixing this issue.

I also think this wasn't an issue around a year ago when I last tried it, and am wondering what has changed since then.

Is this issue resolved then? :)

@DSH105 no, at least as of version 2.6.0 on bukkitdev.