Our clan has noticed people are missing different weapons that were stashed and I can confirm after resorting to my stash that my pre-order LVL1 exotics are still there [THE GOOD] however the max roll/optimised versions of the weapons [LVL 40, THE VERY BAD] are nowhere to be found.
I don't have mule characters and I have only ever played with one Agent so to see missing items I have worked hard for with over 3,134 hours, 188,040 minutes or just under 131 days non-stop seeing weapons go missing due to bad coding is a poor look on the community that is passionate about this franchise.