I just tried to have a diver change uniforms. While he could not wear it, which I will adress in another issue, I noticed a severe issue with trying to stuff another uniform, lying on the ground, into a worn wetsuit.
Trying to do this, the uniform on the ground magically transformed into another wetsuit.
As if this was not enough, repeatedly pulling the new wetsuit into the worn one caused a CTD for me two times.
It tried this with two different combat fatigues, no mods were active.
UPDATE: The newly created wetsuits are NOT functional. Forgot to test this :)