Hello. Could it be due to damage dealt or the final damage from the sides? If there’s a recording of this, I could pass it along to the team for review.

What is a good way to share video recordings, other than youtube?

Google drive works too.

I found a decent site for privacy-conscious people. Here's a snippet of a custom match I set up to try and replicate the problem - https://anonmp4.art/v/OSNo2sTuLRAucQl . The first three kills are all back kills. Even if you discount the 2nd one as maybe being a slightly angled kill, I should have gotten a "2 kills from behind" award for the other two, but didn't. 

I hope I don't get banned for that link :-).

I too have much greater difficulty getting kills from behind than I would expect, including when I use Surge to stun and get behind folks.

Any tutorial or tips would be great.

I and others can give you some tips. This topic is specific to tailsting though, and a possible bug, so please start a new topic and we can have a more generalized discussion there.

Alright. I would share the clip with the team.