So, I’m going to reply to this just because it will probably get noticed even if I don’t.
But the bug is actually with the Greek fire tech not a specific unit, it currently causes all ranged units to gain 30% damage rather than just trebuchets, it affects mercenary ranged units, siege, ships, torches, etc.
Personally I’d like to see it stay as is with some narrowing to only affect byzantine units, because the tech is pretty worthless otherwise.