(This is tongue in cheek, but the spoiler tag has screenshots of the bug, so it's in-game nsfw-ish)
Of course, as any self-respecting drunken berserker will tell you, the option to go running into combat tits out and legless (Literally!!), should also always be an option!
Here are some screenshots of the bug as it appears when switching on the new barbarian armour:
An inverted bug also exists that flips this around, causing you too look temporarily bare-legged and topless. This one occurs most commonly when switching on the githyanki armour:
The issue may exist with other armours - these are the first two tested.
Remember to report any new bugs you find, folks ^.^
If you have the time and energy, submitting them direct to Larian's bug report form is also helpful. It can be found here: https://larian.com/support/baldur-s-gate-3#modal