So I went out to scout this bug anyways (because the only Warp Drive signature I found is the mod by MFerrari) and I tested it with Warp Drive Machine and found the problem. When the ship warps, Warp Drive Machine copies everything standing on it to the new place, and a companion that was on the ship got copied too. The copy looks like your drone but does nothing, while your real drone follows you. Only the basic Atlas was safe from this.
The fix ships with version 2.5, which releases very soon: your companions will step off the ship before the warp and join you again right after it, so no copies are left behind.
If something still looks wrong after the update, please tell me what the drone was doing when the warp happened. Thanks!