Hi @quantumodo,
Thank you for sharing your save file. We have identified the issue in step 136.
However, we don’t believe this is a bug.
The card “08031” (Rapid Response) states:
Put that ally into play from your discard pile.
In your save file, when the ally was defeated, you triggered “19032” (Regroup), which returned “31022” to your hand. As a result, when the ally was defeated, it was in your hand rather than your discard pile, so the condition for “08031” was not met.
If you have any further questions or need clarification, feel free to ask!