But let's not blame it all on Kagura.
Not sure what version of the game you played. But the one i got from dlsite didnt have any bugs (talking about the latest version which is obvious the one kg supposely used as base for the translation)
This is how scenes worked in the jp version:
image played and looped during some frames until you pressed enter or waited a certain amount of time.
This is how kg version works:
Webm plays (doesnt loop) , you press enter to finish it, but, what they did to code is actually saying something like this:
"press enter to end the scene and to loop the scene = results in the scene restarting on top of the scene that was already there."
I wouldnt blame it on KG if i didnt have reason to. Maybe you are not aware but a couple of their previous games still have really bad bugs (zefira, keiko, summer memories, ideology) around that they refuse to fix and just hope people forget they exist. ( take ideology as example: they removed certain cgs from the append version and didnt restore them, a couple npcs got removed from 1 or 2 towns not to mention there are certain scenes u cant trigger ingame like the infamous "Human Son incest scene")