link_to :confirm displays popup twice

I was having this same issue, and spent the better part of an hour looking into it. I found a solution in my situation, and I figured I would share it in case it helps…

My problem was that I had

config.assets.debug = true 

in config/environments/development.rb

Changing that line to

config.assets.debug = false

fixed the confirmation duplication for me. I found the relevant information in this rails guide to asset pipeline. Hope it helps!

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