When Goblin got tech attacked and I used Reactive Code, the game soft-locked. The option I chose was to use Eject Power Cores on a target I had already used it on in the combat.
Ah, this one's a bugbear. It's fixed in the downloadable version, but I can't update the browser version until Godot 4's fixes its html export. I'll add an extra note underneath the HTML version as a warning.