Quick answer: On revive, restore HP and explicitly reinsert the unit into the turn scheduler with a fresh gauge or initiative entry so it earns turns again.
Reviving a fallen hero should bring them back into the fight, including their turns. If they just stand there, the scheduler never re-added them. Here is the fix.
How to fix it
1. Re-add to the scheduler
In the revive handler, after restoring HP, call your scheduler's add/enqueue so the unit is considered for turns again.
2. Seed a fair gauge
Give the revived unit a sensible starting initiative or ATB charge (often partial) so it does not immediately act or wait a full round unfairly.
3. Clear the KO state
Set the unit's status from downed to active and remove the KO flag so action gates no longer skip it.
Catching the ones you can't reproduce
The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.
Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.
This is where a tool like Bugnet earns its place. Its SDK captures every Godot error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.
Most of the time the fix is small. Seeing the failure clearly is the part that actually costs you.