Probably not. It's not like people who got behind such armoured juggernauts wouldn't have better things to do anyway, like stabbing them in the back as there's only mail for protection there...

It was quite common, indeed almost the norm, for the "skirt" of armour, be it the hem of a mail hauberk or the separate laminated "skirt" (can't recall the term) of plate, to hang quite low. If any robes, coats, jupons, or whatever worn under or over it also reached that long or longer was largely a question of current military fashion - and one presumes professional warriors wouldn't have been into fashions that actually hindered their battlefield survivability.

That said, the pointy "tail" of that outer garment looks pretty weird.