Spark Sorc and Infernalist witch self damage?

Wife and I tried to map together - She's currently using Fireflower (Unique Amulet) and Flamewall w/ Arsonists and such. I'm a spark spellweaver and it appears there's some weird interaction when my sparks go through a flame wall, pierce an enemy, and ignites where that same projectile can hit myself and her. Is this an intentional interaction with the amulet?? Any insight would be appreciated.

Thanks!

I can confirm that there is a bugged interaction between this amulet and party play.

My assumption is that the ignite self-damage from the amulet is inherited to any projectile that goes through the flame wall. As in some kind of malfunctioning inheritance of damage source owner.

It can be tested when going with a low level character, you can literally kill someone in the party with this interaction.

this bug can be used to grief hardcore players => should be a high priority bug-fix.