A Neverwinter Nights Persistent World -- Register using the -forum_pwd command in-game.
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I suggest an option within character settings (similar to turning glowy eyes on/off) to allow tails to be seen 'through' cloaks. A lot of cloaks could be used with tails and not look silly, like the scarfs, but any sort of cloak option hides the tail.
So, what we have here is likely a script interfering with cloaks and tails.
Tails have been marked as not hidden with cloaks, meaning it can be visible. However, I suspect we have an underlining engine script that is preventing them from being visible. I would have to further investigate.
I will mark this as rejected though because it should already be a thing.