1.when initiating a ladder at the same time as another player from top and bottom of the ladder -
Neither player climbs, both get shoved off, or both players climb onto the air next to the ladder and get stuck.

2. Kensei's dodge will tech guardbreaks. Not sure if intentional or not, there's no animation so I'm guessing no and figure I'd mention it.
Kensei also retains his head during beheading execution.

3. In brawl if your ally is dead, you kill the enemy team and revive your ally you'll get a notification of "2v0" before the round ends.
Not a biggy, just kind of silly.

4. Certain character's taunts can be cancelled to make their weapons float. Orochi's fast untargetted taunt can be cancelled when he spreads his arms by moving. This will make his sword flip behind his body to his left hip.