When testing out Orcane's interactions with Galvan's UFO, something happened that resulted in 2 stocks being taken from the Orcane in quick succession. I have no idea what could've caused this, so I'm posting both a clip of what happened and the replay file.
#Galvan interaction that took 2 stocks from opponent
placid scaffold
placid scaffold
After looking at the replay while using free cam, it looks like the issue is that my grab positioned Orcane into the blastzone, which caused the first stock to be taken. It also looks my grab didn't get cancelled after Orcane died, so I was grabbing nothing. The game might've still thought that Orcane's collision box or hurtbox was still active, so it caused the second stock to be taken since his position technically didn't change.