Well, I'm going AFK. When I press LMB to take control over bot, the heartbeat sound starts playing.
When I type !pickbot in chat and take control over another bot, I hear the heartbeat sound.
The sound doesn't start playing to a player who just connected to the server, though.
I've tried changing those cvars separately (I mean, before changing «survivor_max_incapacitated_count» I remove your plugin). If I don't change the default cvar (or even remove it from the server config), but change the cvar in plugin's config, I hear the heartbeat sound.
Just changed «l4d_heartbeat_revives» to 0. Nothing else.