So…supposedly I’m wearing my Viking armor but unless we’re doing an reenactment of Emperor’s New Clothes something’s not right…I do have the helmet though…
Also…can’t seem to find anything about nerfing Justice, but my VJM team seems to mildly dysfunctional- perhaps because of the undressed state of things 
Oh I don’t know… technically you have the least amount of restrictions while wearing not armour so you can move more easily… 
In seriousness, assuming restarting the game doesn’t fix it, I’d submit a ticket to support: http://support.505games.com/support/tickets/new
If 505 can’t help then you can try submitting a ticket to IP2 directly, but they’re a tad backed up at the moment.
https://gemsofwar.zendesk.com/hc/en-us
And while it didn’t directly name Justice, there was a change that affected Justice:
Though it could be the state of undress, it’s a toss up between the two really.