I did just receive the Wired continent bonus recently though if I recall the issue was occurring earlier as well.
I've disabled the Fix Merged PCS mod and the issue still persists.
An interesting thing I've figured out so far though is that soldiers that can equip 2 PCS (from AWC perk Digital Warfare, Shadow Ops Classes mod I believe) is that using PCS's on them seems to work fine.
I think I found it, I've disabled every mod I was running until I was only left with the original LW2, Shadow Ops, Medic and Psi Ops mods mostly because they were mods that added classes. I disabled the Shadow Ops mod and the PCS seems to be working as expected again. I'll try reporting the issue to the steam workshop thread though it doesn't look like anyone else has shared my bug experience so far.
I'd never be comfortable running class mods and whatever alongside LW, I do not trust 3rd party fiddlers to that extent.
The most "hip" mod I am trying is the Celatid enemy one, since those buggers are cool, and even that is ruining my immersion due to spelling mistakes in the descriptions, low research time on the corpse and items. As an aside, it does let you make a very sexy scimitar that's fairly balanced, and since I'm not running alien rulers I figure it's ok.
tl;dr Bugs, imbalance and unintended consequences with too many weird mods leads to unintentionally wasting time with bug reports that are not actually LW-related; bad for everyone.