Never seen one of these fail before

There should be a washer on each side of the banjo.
Right you are

Im starting to think whoever swapped the caliper only put one on the top of the hose...unless it blew out completely

I put about 2000 miles on the truck since i bought it and it just now started leaking

Its pretty clear someone messed with it, comparing the left and the right looks like one of those "spot the difference" pics

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