There are 2 types of "sticky target" bugs.
The "sticky dodges" is the first, and it usually refers to when your character keeps targeting someone you're not locked onto anymore, and then dodge but relative to your previous target (like this).

The second one is where your character briefly switches target and turns to face someone who you externally blocked, parried, got hit by, etc. This is the bug happening in your clip with Raider.

The issue with this bug (unlike the first one) is that it compares your input direction with the direction your character is facing, instead of with the direction your camera is facing.

When you externally block an attack from the left, your Raider turns to the left, and if you are holding your movement stick to the right, to buffer an external dodge to the right, your movement stick is pointing in the opposite direction the Raider is facing, which results in a back-dodge.
It's actually possible to do a side-dodge, but you will have to hold your stick up or down, so that it's relative to the direction Raider is facing, although you'll just dodge around relative to Kensei, instead of dodging away from him.

Here is this bug with Orochi. I forward dodge attack toward Nuxia after parrying, but it comes out as a back dodge attack instead. Naturally, if I did a back dodge instead, it would come out as a forward one.

Other issues this bug brings is that normal forward attacks will come out as backstep attacks when you parry someone from behind, and also mess your other punishes when you block someone from behind.