Missing Nemesis etc. Opening Lines?

[gapb]

Describe the bug
Heroes and Villains that have custom opening lines when facing each other aren't (or aren't consistently) using those opening lines. They're instead using their defaults.

What does it affect
Card(s):
Deck(s): Menagerie, Starlight, Cray, Pyre, probably others.

To Reproduce
I first observed this using the following:

1. Select Cray as a the Villain, and select Unstable Pyre as the first hero.
2. Launch the game.
3. Observe.

Expected behavior
The screenshot on the mod page shows following exchange:

Cray: I don't understand. Is this a trick?
Unstable Pyre: I wish I knew. Let's just pretend I'm your conscience, here to make myself heard through all that radiation.

Looking at the code in the git repo, Menagerie and Starlight are likewise supposed to have Nemesis interactions, along with many other combinations.

Screenshots
Cray vs. Unstable Pyre:

Menagerie vs. Starlight:

Logs
N/A, also failing to attach for some reason.

Additional context
Some of my friends report erratic behavior, such as getting the custom opening lines one game and then not the next. I haven't done an exhaustive test, these are just the two I noticed.