If there is no visible prompt at all, then that is very understandable. The PR issue exposes a real gap though: subagent spawns need a human-readable audit trial, of its goals/intent, its boundaries and scope and limitations, etc; for basic responsible agentic harness functionality.
Add? Just make the sub-agents input prompt not encrypted, change "encrypted: true" to "encrypted: false" everywhere and everything continues to work as it used to (simplified, but you get the idea).
They need to fix the regression, not add something new here.
Hopefully they can add that.