Hmmm... I'm not seeing a scene transition issue with the VN.
After Heidi says "...protect your princess!":
then regardless of any other pathing there's a music fadeout of three seconds and a black screen fadeout/fadein of three seconds each.
In the particular case with Val's preggo setup (scene in Val's car) you get a music fadein and a scene fadein of her in her car:
So, that's a minimum of 3 seconds of music fade and 6 seconds of black fadout/fadein from Athena's room to Val's car. Maybe I'm looking at a different Heidi on Athena bed with MC while she's streaming scene than you