I've been wanting these JMS outfits for over a year now. They're not part of a collab as far as I'm aware so it's disappointing they haven't made their way over yet. I don't really care how they're added either (ssb/wagon/unique rng box/etc)
This is usually caused by your computer and/or client. Try restarting your computer, updating it (.net framework causes issues like this sometimes), or repairing your client.
I'm not having any issues with Defensive Formation, just to be clear.
The revamp as a whole, if ported as it was from JMS, would've been great. The overly nerfed version they gave us stacked with huge bugs is a disaster, though.